A coin is tossed 7 times.Each time a man calls head.Probability that he wins the toss on more occasions is?a)1/4 b)5/8 c)1/2 d)None of these

Dear Chilukuri

Prob of winning toss is when he get head 4,5,6 or 7 times which is

7C4*(1/2)^7+7C5*(1/2)^7+7C6*(1/2)^7+7C7*(1/2)^7=1/2

So answer is C

All the best.

AKASH GOYAL

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