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14 August, 14:28

There is a bag with only red marbles and blue marbles. The probability of randomly choosing a red marble is 1/8. There are 56 marbles in the bag and each is equally likely to be chosen. Work out how many red marbles there must be

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  1. 14 August, 15:23
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    7 red marbles

    Step-by-step explanation:

    P (red) = red marbles / total marbles = 1/8

    We know there are 56 marbles

    red marbles/56 = 1/8

    Multiply by 56

    red marbles = 1/8 * 56 = 7

    There are 7 red marbles
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