RD Sharma - Mathematics (Volume 2)

Book: RD Sharma - Mathematics (Volume 2)

Chapter: 33. Binomial Distribution

Subject: Maths - Class 12th

Q. No. 25 of MCQ

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Mark the correct alternative in the following:

The probability of selecting a male or a female is same. If the probability that in an office of n persons (n – 1) males being selected is , the value of n is



p(x=n-1) =


p(x=n-1) = nCn-1 pn-1 q1

Since p=q

p(x=n-1)= n pn-1q

=n pn-1p



comparing LHS anr RHS

we have,


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