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14 May, 02:56

There are 22 gloves in a drawer: 5 pairs of red gloves, 4 pairs of yellow, and 2 pairs of green. You select the gloves in the dark and can check them only after a selection has been made. What is the smallest number of gloves you need to select to have at least one matching pair in the best case? In the worst case?

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  1. 14 May, 04:50
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    Best-case = 2 gloves

    Worst-case = 12 gloves

    Explanation:

    For the best-case: Because there is a chance that you take two gloves of the same color in the first two round the answer is two. For the worst-case: The worst case would be if, for each color-group of gloves you take the right or left glove, for example, you take 5 left-hand red gloves then 4 left-hand yellow gloves, then 2 left-hand green gloves, because you have already taken all of the left gloves the next one is going to be a right glove that is going to pair with one of the already selected gloves, therefore, the answer is 12 - > 5+4+2+1 = 12
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