From 36 candidates, 4 officers are elected. This is an example of
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Permutation because the order of which officer gets elected first, second, third, and last does not matter. Permutation because the order of which officer gets elected first, second, third, and last matters. Combination because the order of which officer gets elected first, second, third, and last does not matter. Combination because the order of which officer gets elected first, second, third, and last matters.