Out of 4 men and 4 women, how many different committees of exactly 3 men and 2 women can be formed (order does not matter)?
Aptitude
Permutation and Combination
Difficulty: Easy
Choose an option
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A15
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B16
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C20
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D24
Answer
Correct Answer: 24
Explanation
Introduction / Context:We select fixed counts from each subgroup. Order of members on a committee is irrelevant, so use combinations.
Given Data / Assumptions:
- Men = 4; choose 3.
- Women = 4; choose 2.
- Committees are sets (no roles or ordering).
Concept / Approach:Compute C(4,3) * C(4,2) by independence across disjoint groups.
Step-by-Step Solution:C(4,3) = 4.C(4,2) = 6.Total = 4 * 6 = 24.
Verification / Alternative check:Enumerating men first, then women, or vice versa, yields the same product.
Why Other Options Are Wrong:20 and 16 are near-miss counts (e.g., forgetting some combinations); 15 is C(6,2) and unrelated.
Common Pitfalls:Accidentally using permutations or mixing order into a committee selection.
Final Answer:24