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20 May, 19:13

Count the possible combinations of 4 letters chosen from D, E, F, G, H.

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  1. 20 May, 22:42
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    You would use the formula nCr

    n = 5 which is the number of letters available which are D E F G H

    r = 4 sample of letters

    you can easily plug into the calculator ... or work with the formula!

    5C4 = 5

    so there are 5 combinations
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