60 blue marbles and 40 red marbles are in a jar. How many red marbles must be removed from the jar so that the probability of choosing a blue marble from the jar is 3/4 A 5 B. 10 C 15 D. 20
First you add 60 and 40 to get the total of 100. Then you subtract 100 by 3/4 which in a decimal is 0.75. Subtract that and you should get 99.25 as your answer
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