RD Sharma - Mathematics (Volume 2)

Book: RD Sharma - Mathematics (Volume 2)

Chapter: 33. Binomial Distribution

Subject: Maths - Class 12th

Q. No. 24 of MCQ

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Mark the correct alternative in the following:

A coin is tossed n times. The probability of getting at least once is greater than 0.8. Then, the least value of n, is



P(H)= H1Tn-1+H2Tn-2+H3Tn-3+…..+Hn-1T1+Hn

Required probability = p= 1-


For n= 2

For n=3

So, n=3

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