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24 February, 04:49

The numbers 3, 4, 5, and 7 are written on separate pieces of paper and put into a hat. Two pieces of paper are drawn at the same time and the product of the numbers is recorded. Find the sample space.

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  1. 24 February, 08:38
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    the final sample space is { 12,15,20,21,28,35}

    Step-by-step explanation:

    the sample space is the set of possible outcomes of the experiment, then the possible products are

    3*7 = 21

    3*5 = 15

    3*4 = 12

    4*7 = 28

    4*5 = 20

    5*7 = 35

    since the product of 2 numbers is commutative, then we do not count the other possible combinations

    therefore the final sample space is { 12,15,20,21,28,35}

    Note:

    to check that we have all the products, the possible combinations are

    C (4,2) = 4! / (4-2) !*2! = 3*2*1 = 6

    since we have considered 6 products, we are sure that our result is correct
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