A and b stand in a ring with 9 persons.if the arrangement of 11 persons is at random then the probability that there are exactly 4 persons between a and b is

Question

Arun · Answer

Dear student

Fix the position of A, then B can be sit in 10 positions, so total possible outcome = 10
Now, exactly 4 persons are sitting between them. This can be done in two ways as shown in figure, so favourable outcomes = 2
So, probability = 2/10 = 1/5

Regards

Arun (askIITians forum expert)

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A and b stand in a ring with 9 persons.if the arrangement of 11 persons is at random then the probability that there are exactly 4 persons between a and b is

A and b stand in a ring with 9 persons.if the arrangement of 11 persons is at random then the probability that there are exactly 4 persons between a and b is

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A and b stand in a ring with 9 persons.if the arrangement of 11 persons is at random then the probability that there are exactly 4 persons between a and b is

A and b stand in a ring with 9 persons.if the arrangement of 11 persons is at random then the probability that there are exactly 4 persons between a and b is

1 Answers

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