Answer:
a. P
b. C
c. C
d. C
e. P
Explanation:
When order matters, the count is of permutations. When order doesn't matter, then you count combinations.
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a. Order matters: It makes a difference to the three people chosen which one gets what color ribbon. (permutations)
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b. Order doesn't matter. Bob and Charlie and Alice are effectively the same as Alice and Bob and Charlie. (combinations)
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c. Order doesn't matter. (combinations)
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d. Assuming the representative positions all have the same duties, order doesn't matter. (combinations)
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e. The order of sprinters on a relay team matters. (permutations)