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An elevator starts with m passengers and...

An elevator starts with m passengers and stops at n floors `( m le n)` The probability that no two passengers alight at the same floor is

A

`(""^(n)P_m)/(m^(n))`

B

`(""^(n)P_m)/(n^(m))`

C

`(""^(n)C_m)/(m^n)`

D

`(""^(n)C_m)/(n^m)`

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The correct Answer is:
B
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