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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?

a fair coin is tossed 99 times of x is the number of heads occur.then p(x=r) is maximum when r is?

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1 Answers

Askiitians Expert Soumyajit IIT-Kharagpur
28 Points
12 years ago

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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Askiitians Experts
Soumyajit Das IIT Kharagpur

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