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7 February, 11:03

A die is loaded so that the number 6 comes up three times as often as any other number. what is the probability of rolling a 1 or a 6?

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  1. 7 February, 14:57
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    1/2.

    Step-by-step explanation:

    Probability totals must add up to 1.

    P = probability.

    If P (any number other than 6) = x, then P (6) = 3x, so

    3x + 5x = 1

    x = 1/8

    P (6) = 3/8 and P (not 6) = 1/8

    Therefore P (6 or 1) = 3/8 + 1/8 = 1/2 (answer).
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