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Question
The number of ways of arranging 6 boys and 6 girls in a row so that boys and girls come alternatively
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Solution
The correct option is D 2.6! 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!
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!
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