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A man takes a step forward with probability 0.4 and backwards with probability 0.6 Find the probability that at the end of eleven steps he is just one step away from the starting point?
Wiki User
∙ 11y ago
1. He takes 6 steps forward and 5 steps backward
2. He takes 5 steps forward and 6 steps backward
consider 1:
p1 = (11C6)(0.4)^6*(0.6)^5
for 2:
p2 = 11C5(0.4)^5*(0.6)^6
total probability = p1 + p2
Wiki User
∙ 11y ago
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