There is a bag with only red marbles and blue marbles. The probability of randomly choosing a red marble is 5/ 12 . There are 84 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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5
Answer:
There are 49 red marbles.
Step-by-step explanation:
7x12=84
5/12x7 both up and down=35/84 so we get that there are 35 blue marbles out of 84 marbles
red marbles=84-35
=49
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