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What is the expression for a 5-member committee with exactly 2 girls from 6 boys and 5 girls?

Answer and explanation

Correct answer: ⁵C₂ × ⁶C₃

The committee must contain exactly 2 girls, so first choose 2 girls from the 5 available: ⁵C₂ ways. Its total size is 5, so the remaining 3 members must be boys; these can be chosen from 6 boys in ⁶C₃ ways. By the multiplication principle, the required expression is ⁵C₂ × ⁶C₃, making option A correct. Because a committee is an unordered group, combinations rather than permutations must be used. ¹¹C₅ ignores the exact requirement and allows any number of girls. ⁵P₂ × ⁶P₃ treats committee membership as ordered, and option D selects 3 girls and 2 boys, which is the opposite of the stated condition.

Related tags

CombinationExact ConditionCommittee SelectionCombinationsPermutations And CombinationsMathematicsClass 11 Mcq

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