In how many ways can a committee of 2 be chosen from 8 people?
Answer and explanation
Correct answer: C. 28
- Step 1: Order does not matter, so use combinations: C(8, 2) = 8! / (2! x 6!).
- Step 2: C(8, 2) = 28.
Answer
28.
Why not the others: '56' counts ordered selections (permutations) instead of combinations; '16' multiplies n and k; '36' adds n to the correct count.
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