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Class 11MathematicsPermutations and CombinationsCombinationsExpert
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From (12) people, (5) are to be chosen. Exactly (1) of (3) special people must be selected. How many selections are possible?

Answer and explanation

Correct answer: (378)

Choose (1) special person and the remaining (4) people from the other (9). The number is (^{3}C_{1}\times{}^{9}C_{4}=378).

Related tags

Exactly-OneSpecialCombinationsPermutations And CombinationsMathematicsClass 11 Mcq
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