RD Sharma - Mathematics (Volume 2)

Book: RD Sharma - Mathematics (Volume 2)

Chapter: 33. Binomial Distribution

Subject: Maths - Class 12th

Q. No. 6 of MCQ

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Mark the correct alternative in the following:

A fair die is thrown twenty times. The probability that on the tenth throw the fourth six appears is


Total outcomes= 610

Fourth 6 is at 10th place.

So other three 6 have to be placed at any of the remaining 9 places=9C356

For remaining 5 places we have 1,2,3,4&5

So total number of favorable cases

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