Out of 7 boys and 4 girls, how many queues of 3 boys and 2 girls can be formed ?
The number of queues is 25,200. Choose the people in \(\binom{7}{3}\binom{4}{2}\) \(=35\times6\) \(=210\) ways, then order the five selected people in \(5!=120\) ways,…
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Out of 7 boys and 4 girls, how many queues of 3 boys and 2 girls can be formed ?
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Correct answer B
The number of queues is 25,200. Choose the people in ways, then order the five selected people in ways, giving .
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Karnataka SET (KSET)