RD Sharma - Mathematics (Volume 2)

Book: RD Sharma - Mathematics (Volume 2)

Chapter: 33. Binomial Distribution

Subject: Maths - Class 12th

Q. No. 11 of MCQ

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Mark the correct alternative in the following:

The least number of times a fair coin must be tossed so that the probability of getting at least one head is at least 0.8, is


P(atleast 1 head) = 0.8


p(H)=p(T) = 1/2

Required probability = p= 1-


For n= 2

For n=3

So, n=3

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