RD Sharma - Mathematics (Volume 2)

Book: RD Sharma - Mathematics (Volume 2)

Chapter: 33. Binomial Distribution

Subject: Maths - Class 12th

Q. No. 2 of Very Short Answer

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2

If in a binomial distribution mean is 5 and variance is 4, write the number of trials.

Given:


Mean=5=np


Variance=4


=np(1-p)


n=?


5(1-p)=4



P=


np=5


n= 25


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