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21-06-2016
Mathematics

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There are 5 boys and 4 girls in my class. All of them are distinguishable. In how many ways can they be seated in a row of 9 chairs such that at least 3 girls are all next to each other?

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Jisallyouget Jisallyouget

26-06-2016

There are 16 ways to arrange the row so that at least 3 girls always sit next to each other.

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