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here is a bag with only red marbles and blue marbles. The probability of randomly choosing a red marble is 7 /9 . There are 63 marbles in total in the bag and each is equally likely to be chosen. how many red marbles there must be.

Sagot :

Divide 63 by the denominator of the probability: 63/9= 7
Now, multiply 7 by the numerator of the fraction to get the number of red marbles are 7x7=49
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