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a man takes a step forward with probability .04 and backwards with a probability .06 . find the probability that at the end of 11 steps he is 1 step away from the initial point .
Guest Feb 15, 2012
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akash:

a man takes a step forward with probability .04 and backwards with a probability .06 . find the probability that at the end of 11 steps he is 1 step away from the initial point .


Random Walk Problem:

p = 0.4
q = 0.6
n = 11
x = 1
np = (n+x)/2 = 6
nq = (n-x)/2 = 5

P(np)=ncr( n, np )*p^np*q^(n-np)

[input]ncr( 11, 6 ) * 0.4^6*0.6^(11-6)[/input]
admin  Feb 15, 2012

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