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Question

The number of ways in which 5 Boys and 5 Girls can be arranged in a row so that no two girls are together is

A
10!
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B
5!6!
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C
(5!)2
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D
2(5!)2
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Solution

The correct option is B 5!6!
x B1 x B2 x B3 x B4 x B5 x

6 ×'s are there, for 5 girls to sit.
So, the total no. of ways in which the boys can be seated =5!
So, the total no. of ways in which the girls can be seated = 6P5=6!
The total no. of ways =6!×5!

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