RD Sharma - Mathematics (Volume 2)

Book: RD Sharma - Mathematics (Volume 2)

Chapter: 33. Binomial Distribution

Subject: Maths - Class 12th

Q. No. 24 of Exercise 33.2

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24

A die is tossed twice. A ‘success’ is getting an even number on a toss. Find the variance of some successes.

Let p be the probability of getting an even number on the toss when a die is thrown.


Let q be the probability of not getting an even number on the toss when a die is thrown.



As X follows a binomial distribution with,



Variance = npq



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