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1 October, 13:45

There is a bag with only red marbles and blue marbles. The probability of randomly choosing a red marble is 3 8. There are 18 red marbles in the bag and each is equally likely to be chosen. Work out how many marbles in total there must be.

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  1. 1 October, 14:05
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    There are 48 marbles in the bag

    Step-by-step explanation:

    red: blue : total

    3 8

    there are 18 red

    18/3 = 6

    Multiply everything by 6

    3*6 8*6

    18 48

    There are 48 marbles in the bag
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