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16 September, 10:30

A 5 sided solid has the numbers 1,2,3,4, and 5. what is the probability of rolling two five-sided solids and getting a sum of either a 4 or an 8

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  1. 16 September, 13:58
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    So this is going to be alot of writing to show my thinking but ill bold the answer.

    1,1

    1,2

    1,3

    1,4

    1,5

    2,1

    2,2

    2,3

    2,4

    2,5

    3,1

    3,2

    3,3

    3,4

    3,5

    4,1

    4,2

    4,3

    4,4

    4,5

    5,1

    5,2

    5,3

    5,4

    5,5

    next ill mark all the ones that equal 4 or 8 when added together, with an x

    1,1

    1,2

    x1,3

    1,4

    1,5

    2,1

    x2,2

    2,3

    2,4

    2,5

    x3,1

    3,2

    3,3

    3,4

    x3,5

    4,1

    4,2

    4,3

    x4,4

    4,5

    5,1

    5,2

    x5,3

    5,4

    5,5

    that is 6 (that equal 4 or 8) out of 25

    so your ratio would be 6:19
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