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15 August, 08:17

There is a bag with only red marbles and blue marbles.

The probability of randomly choosing a red marble is

7/10

There are 42 red marbles in the bag and each is equally likely to be chosen.

How many marbles in total must there be?

+3
Answers (1)
  1. 15 August, 11:30
    0
    There are 60 marbles in the bag

    Step-by-step explanation:

    The total number of marbles times the probability of red marbles = number of red marbles

    total * 7/10 = 42

    Multiply each side by 10/7

    total * 7/10 * 10/7 = 42*10/7

    total

    60

    There are 60 marbles in the bag
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