n=7,r=3,p=0.25

Pr= 7!/3!(7-3)!=1(0.25)^3(1-0.25)^4 =0.004943848.

Why is this answer wrong ?

The correct answer is 0.173035

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- Feb 2nd 2007, 11:53 AMchaosx[SOLVED] binomial distribution problem
n=7,r=3,p=0.25

Pr= 7!/3!(7-3)!=1(0.25)^3(1-0.25)^4 =0.004943848.

Why is this answer wrong ?

The correct answer is 0.173035 - Feb 2nd 2007, 12:02 PMCaptainBlack