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a fair coin is tossed 99 times of x is the number of heads occur.then p(x=r) is maximum when r is?
Dear Sri Valli,
Ans:- The no of head comes out to be r has the probability
P=nCr (1/2)^99
so it will be max or min accordingly as nCr is max or min. Thus it is max when r=(99+1)/2 or (99-1)/2
or r=50 or 49(ans)
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Regards,
Askiitians ExpertsSoumyajit Das IIT Kharagpur
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