there
there is a bag with only red marbles and blue marbles.
The probability of randomly choosing a blue marble is
5
12
.
There are 72 marbles in total in the bag and each is equally likely to be chosen.
Work out how many red marbles there must be
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There is a bag with only red marbles and blue marbles. There are 72 marbles in total in the bag and each is equally likely to be chosen. Work out how many red marbles there must be. Therefore, 12/12 is for prob of 1, and 1/12 probability means 6 blue marbles and 66 red marbles ANSWER.
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