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A game of Plinko is played by dropping a ball at the top-middle of a set of pegs. Each time the ball hits a peg, it has a  probability of deflecting either to the left or to the right. What is the probability that the ball lands in the middle slot as shown in the diagram (the red line)?

 

I know this problem has been answered before and the answer is wrong. 

 

 Apr 12, 2019
 #1
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The probability is 7/128.

 Nov 29, 2019

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