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Question

Four men and three women are standing in a line for railway ticket. The probability of standing them in alternate manner is

A
135
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B
133
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C
184
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D
17
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Solution

The correct option is A 135
Total number of ways of standing four men and three women in a line
=7!
Number of ways of standing them in alternate manner
i.e.{MWMWMWM}=4!3!
Required probability
=4!3!7!=6765=135

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