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The numbers 1, 2, 3,…, n are arranged in...

The numbers 1, 2, 3,…, n are arranged in a random order. Then, the probability that the digits `1, 2, 3,…, k(kltn)` appears as neighbours in that order, is

A

`((n-k)!)/(n!)`

B

`((n-k+1)!)/(.^nC_k)`

C

`(n-k)/(,^nC_k)`

D

`(k!)/(n!)`

Text Solution

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The correct Answer is:
(b)
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