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18 June, 05:24

How many combinations of 6 different 10th grade subjects can tyler choose from the 9 subjects offered?

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  1. 18 June, 05:39
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    This is simply a Combination Problem: The number of 6-combinations from a set S with 9 elements. Using the definition of Combinations:

    C (9,6) = (9!) / [ (6!) (9-6) !] = 84

    So your answer is 84.
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