in DS
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3 votes
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in DS
504 views

1 comment

what is the correct answer of this question
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1 Answer

4 votes
4 votes

Binomial trials

Here we require exactly k success where probability of success is 1/n and of failure is 1-1/n. So

Pr = nCk (1/n)^k(1-1/n)^(n-k)

So option b is correct

3 Comments

I got the same answer but given in key is A.
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Thanks.
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