|
Big
Board Plinko Probabilities
based on Pascal's Triangle
|
Chip Starting in Slot
A B
C D
Summary |
Chip
starting in Slot A:
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A |
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B |
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C |
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D |
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E |
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F |
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G |
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1 |
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1 |
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1 |
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1 |
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2 |
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1 |
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1 |
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3 |
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3 |
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1 |
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1 |
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4 |
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6 |
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4 |
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1 |
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1 |
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5 |
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10 |
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10 |
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5 |
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1 |
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1 |
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6 |
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15 |
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20 |
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15 |
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6 |
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1 |
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1 |
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7 |
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21 |
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35 |
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35 |
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21 |
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7 |
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1 |
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1 |
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8 |
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28 |
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56 |
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70 |
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56 |
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28 |
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8 |
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1 |
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1 |
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9 |
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36 |
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84 |
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126 |
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126 |
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84 |
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36 |
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9 |
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1 |
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1 |
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10 |
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45 |
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120 |
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210 |
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252 |
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210 |
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120 |
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45 |
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10 |
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1 |
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1 |
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11 |
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55 |
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165 |
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330 |
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462 |
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462 |
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330 |
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165 |
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55 |
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11 |
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1 |
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1 |
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12 |
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66 |
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220 |
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495 |
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792 |
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924 |
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792 |
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495 |
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220 |
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66 |
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12 |
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1 |
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A' |
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B' |
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C' |
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D' |
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E' |
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F' |
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G' |
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$
1
0
0 |
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$
5
0
0 |
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$
1
0
0
0 |
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$
0 |
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$
1
0
0
0
0 |
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$
0 |
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$
1
0
0
0 |
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Note: Columns H' and
I' are omitted. The probability that a chip starting in A
will land in those slots is zero.
|
Using the reflection technique, we
obtain the numerators of the fractions in the chart below. The
denominator is 212 = 4096.

Conditional Probabilities:
| P(A'|A) |
P(B'|A) |
P(C'|A) |
P(D'|A) |
P(E'|A) |
P(F'|A) |
P(G'|A) |
P(H'|A)
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P(I'|A) |
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0 |
0 |
| 0.226 |
0.387 |
0.242 |
0.107 |
0.032 |
0.006 |
0.000 |
0 |
0 |
Chip
starting in Slot B:
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A |
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B |
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C |
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D |
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E |
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F |
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G |
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I |
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1 |
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1 |
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3 |
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1 |
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1 |
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4 |
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6 |
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4 |
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1 |
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1 |
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5 |
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10 |
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10 |
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5 |
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1 |
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1 |
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6 |
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15 |
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20 |
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15 |
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6 |
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1 |
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1 |
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7 |
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21 |
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35 |
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35 |
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21 |
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7 |
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1 |
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1 |
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8 |
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28 |
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56 |
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70 |
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56 |
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28 |
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8 |
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1 |
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1 |
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9 |
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36 |
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84 |
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126 |
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126 |
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84 |
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36 |
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9 |
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1 |
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1 |
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10 |
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45 |
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120 |
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210 |
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252 |
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210 |
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120 |
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45 |
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10 |
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1 |
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1 |
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11 |
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55 |
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165 |
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330 |
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462 |
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462 |
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330 |
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165 |
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55 |
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11 |
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1 |
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1 |
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12 |
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66 |
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220 |
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495 |
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792 |
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924 |
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792 |
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495 |
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220 |
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66 |
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12 |
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1 |
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A' |
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B' |
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C' |
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D' |
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E' |
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F' |
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G' |
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H' |
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$
1
0
0 |
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$
5
0
0 |
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$
1
0
0
0 |
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$
0 |
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$
1
0
0
0
0 |
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$
0 |
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$
1
0
0
0 |
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$
5
0
0 |
| NOTE: Column H' is
omitted. The probability that a chip starting in slot B will
land in H' is zero. |
Using the reflection technique, we
obtain the numerators of the fractions in the chart below. The
denominator is 212 = 4096.
Conditional Probabilities:
| P(A'|B) |
P(B'|B) |
P(C'|B) |
P(D'|B) |
P(E'|B) |
P(F'|B) |
P(G'|B) |
P(H'|B)
|
P(I'|B) |
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0 |
| 0.193 |
0.346 |
0.247 |
0.137 |
0.057 |
0.016 |
0.003 |
0.000 |
0 |
Chip
starting in Slot C:
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A |
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B |
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C |
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D |
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E |
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F |
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G |
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H |
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I |
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1 |
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4 |
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1 |
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1 |
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6 |
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15 |
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20 |
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15 |
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6 |
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1 |
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1 |
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7 |
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21 |
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35 |
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35 |
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21 |
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7 |
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1 |
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1 |
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8 |
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28 |
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56 |
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70 |
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56 |
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28 |
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8 |
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1 |
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1 |
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9 |
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36 |
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84 |
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126 |
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126 |
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84 |
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36 |
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9 |
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1 |
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1 |
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10 |
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45 |
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120 |
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210 |
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252 |
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210 |
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120 |
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45 |
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10 |
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1 |
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1 |
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11 |
|
55 |
|
165 |
|
330 |
|
462 |
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462 |
|
330 |
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165 |
|
55 |
|
11 |
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1 |
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1 |
|
12 |
|
66 |
|
220 |
|
495 |
|
792 |
|
924 |
|
792 |
|
495 |
|
220 |
|
66 |
|
12 |
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1 |
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A' |
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B' |
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C' |
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D' |
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E' |
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F' |
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G' |
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H' |
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I' |
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$
1
0
0 |
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$
5
0
0
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$
1
0
0
0 |
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$
0 |
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$
1
0
0
0
0 |
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$
0 |
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$
1
0
0
0 |
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$
5
0
0
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$
1
0
0
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|
Using the reflection technique, we
obtain the numerators of the fractions in the chart below. The
denominator is 212 = 4096.

Conditional Probabilities:
| P(A'|C) |
P(B'|C) |
P(C'|B) |
P(D'|C) |
P(E'|C) |
P(F'|C) |
P(G'|C) |
P(H'|C)
|
P(I'|C) |
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|
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 |
 |
 |
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|
|
| 0.121 |
0.247 |
0.241 |
0.196 |
0.121 |
0.054 |
0.016 |
0.003
|
0.000 |
Chip
starting in Slot D:
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A |
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B |
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C |
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D |
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E |
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F |
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G |
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H |
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I |
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1
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1 |
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1 |
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1 |
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2 |
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1 |
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1 |
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3 |
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3 |
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1 |
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1 |
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4 |
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6 |
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4 |
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1 |
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1 |
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5 |
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10 |
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10 |
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5 |
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1 |
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1 |
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6 |
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15 |
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20 |
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15 |
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6 |
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1 |
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1 |
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7 |
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21 |
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35 |
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35 |
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21 |
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7 |
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1 |
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1 |
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8 |
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28 |
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56 |
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70 |
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56 |
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28 |
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8 |
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1 |
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1 |
|
9 |
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36 |
|
84 |
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126 |
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126 |
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84 |
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36 |
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9 |
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1 |
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1 |
|
10 |
|
45 |
|
120 |
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210 |
|
252 |
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210 |
|
120 |
|
45 |
|
10 |
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1 |
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1 |
|
11 |
|
55 |
|
165 |
|
330 |
|
462 |
|
462 |
|
330 |
|
165 |
|
55 |
|
11 |
|
1 |
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1 |
|
12 |
|
66 |
|
220 |
|
495 |
|
792 |
|
924 |
|
792 |
|
495 |
|
220 |
|
66 |
|
12 |
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1 |
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A' |
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B' |
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C' |
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D' |
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E' |
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F' |
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G' |
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H' |
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I' |
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$
1
0
0 |
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$
5
0
0
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$
1
0
0
0 |
|
$
0 |
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$
1
0
0
0
0 |
|
$
0 |
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$
1
0
0
0 |
|
$
5
0
0
|
|
$
1
0
0
|
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|
Using the reflection technique, we
obtain the numerators of the fractions in the chart below. The
denominator is 212 = 4096.

Conditional Probabilities:
| P(A'|D) |
P(B'|D) |
P(C'|D) |
P(D'|D) |
P(E'|D) |
P(F'|D) |
P(G'|D) |
P(H'|D)
|
P(I'|D) |
 |
 |
 |
 |
|
|
|
|
|
| 0.054 |
0.137 |
0.196 |
0.226 |
0.193 |
0.121 |
0.054 |
0.016
|
0.003 |
The conditional probabilities for a
chip dropped in slots F, G, H, and I are obtained by symmetry.
Summary
of Conditional Probabilities:
| Column
End
Begin |
A'
$100
|
B'
$500
|
C'
$1000
|
D'
$0
|
E'
$10000
|
F'
$0
|
G'
$1000
|
H'
$500
|
I'
$100
|
| A |
0.226 |
0.387 |
0.242 |
0.107 |
0.032 |
0.006 |
0.000 |
0 |
0 |
| B |
0.193 |
0.346 |
0.247 |
0.137 |
0.057 |
0.016 |
0.003 |
0.000 |
0 |
| C |
0.121 |
0.247 |
0.241 |
0.196 |
0.121 |
0.054 |
0.016 |
0.003 |
0.000 |
| D |
0.054 |
0.137 |
0.196 |
0.226 |
0.193 |
0.121 |
0.054 |
0.016 |
0.003 |
| E |
0.016 |
0.057 |
0.121 |
0.193 |
0.226 |
0.193 |
0.121 |
0.057 |
0.016 |
| F |
0.003
|
0.016 |
0.054
|
0.121
|
0.193
|
0.225
|
0.196
|
0.137 |
0.054 |
| G |
0.000 |
0.003 |
0.016 |
0.054 |
0.121 |
0.196 |
0.241 |
0.247 |
0.121 |
| H |
0 |
0.000 |
0.003 |
0.016 |
0.057 |
0.137 |
0.247 |
0.346 |
0.193 |
| I |
0 |
0 |
0.000 |
0.006 |
0.032 |
0.107 |
0.242 |
0.387 |
0.226 |
|