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8 May, 13:30

An election ballot asks voters to select five city commissioners from a group of thirteen candidates. In how many ways can this be done?

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  1. 8 May, 14:18
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    This can be solved using permutations. You can get more into this online or just accept a quick answer here.

    Since there are certain roles to be filled this is a permutation.

    You need a somewhat smart calculator for this.

    If I remember this right you'd type in the number of people you are choosing from, P, and then the places you are trying to fill.

    So it should look like this:

    13 P 5

    You can find where permutations and combinations are in your calculator using a handbook or the internet but usually it looks like nPr for permutation or nCr for combination.
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