Home Maths Probability Use of Permutations and Combinatons in Probability Fifteen persons among whom are A and B , sit…
Maths Probability Use of Permutations and Combinatons in Probability Single Correct MCQ
Published on: August 13, 2026

Fifteen persons among whom are A and B , sit down at random at a round table. The probability that there are 4 persons between A and B , is

A
B
C
D

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Text Solution

Verified by Experts
The correct answer is:
D

Let occupy any seat at the round table. Then there are 14 seats available for

If there are to be four persons between and

Then has only two ways to sit, as show in the fig.

Hence required probability

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