1. Permutation, the order of the arrangement here matters since we are to find the first, second, and the third winners, respectively.
2. Combination, we are just to select from the given toppings, hence the order of our choices does not matter.
3. Combination, choosing 3 songs out of 7 doesn't require the order of our choices.
4. Permutation, this takes into account the order of the persons who will be picture taking. Order of the arrangement here matters..
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Answers & Comments
1. Permutation, the order of the arrangement here matters since we are to find the first, second, and the third winners, respectively.
2. Combination, we are just to select from the given toppings, hence the order of our choices does not matter.
3. Combination, choosing 3 songs out of 7 doesn't require the order of our choices.
4. Permutation, this takes into account the order of the persons who will be picture taking. Order of the arrangement here matters..