The number of ways of arranging 6 boys and 6 girls in a row so that boys and girls come alternatively
A
6! 6!
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B
7! 6!
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C
7.6! 6!
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D
2.6! 6!
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Solution
The correct option is D2.6! 6! The row may begin with either a boy or a girl (2 ways) If it begins with a boy, then the odd places will be occupied by boy and even places by girls i.e., 6! 6!. ∴ required number of ways = 2.6! 6!