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7 July, 19:37

A pair of dice is rolled 20 times. what is the probability that a sum of 5 is rolled at least r times

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  1. 7 July, 20:49
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    The probability of the sum of 5 is 5/20 or 1/4.

    Solution:

    Formula: P (A) = No. of favorable outcomes / Total no. of possible outcomes

    P (A) = 5/20

    P (A) = 1/4
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