Q. 81

Eight coins are tossed together. The probability of getting exactly 3 heads is
A.

B.

C.

D.

Correct

Answer :

We know, probability distribution P(X=r)=nCr (p)r qn-r

Here. Total number coin is tossed, n =


The probability of getting head, p =1/2


The probability of getting tail, q = 1/2


Required probability = 8C3


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