RD Sharma - Mathematics (Volume 2)

Book: RD Sharma - Mathematics (Volume 2)

Chapter: 33. Binomial Distribution

Subject: Maths - Class 12th

Q. No. 4 of MCQ

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Mark the correct alternative in the following:

A fair coin is tossed a fixed number of times. If the probability of getting seven heads is equal to that of getting nine heads, the probability of getting two heads is


P(getting a head)=

Probability of getting 7 heads = nC7 (1/2)n

Probability of getting 9 heads = nC9 (1/2)n

Both probabilities are equal if n=9+7=16

So probability of getting 4 heads =16C416

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