2778. A group of tourists, in which 7 boys and 4 girls

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Uploaded: 21.10.2018
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2778. A group of tourists, in which 7 boys and 4 girls, are chosen by lot on four duty men. What is the probability that 2 boys and 2 girls will be selected?

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Detailed solution. Decorated in Microsoft Word 2003 (Quest decided to use the formula editor)

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