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Q.

The number of ways in which 7 boys and 7 girls can sit in a row. So that the boys and girls sit alternatively

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a

None

b

7!

c

2x7!x7!

d

7!7!

answer is B.

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Detailed Solution

Given number of boys = 7, number of girls = 7

Boys and girls sit alternately

First arrange all the boys in 7! ways

Girls can be arranged alternatively in 7! ways.

Number of ways of arrangements in 2x7!x7!

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