RD Sharma - Mathematics (Volume 2)

Book: RD Sharma - Mathematics (Volume 2)

Chapter: 33. Binomial Distribution

Subject: Maths - Class 12th

Q. No. 28 of Exercise 33.2

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Three cards are drawn successively with replacement from a well - shuffled pack of 52 cards. Find the mean and variance of some red cards.

Let p = probability of drawing a red card

Let a number of the red cards drawn be X.

X follows a binomial distribution with,

The required binomial distribution is given by,

So, mean = np

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