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In a stack of cards, 9 cards are blue and the rest are red. If 2 cards are to be chosen at random from the stack without

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In a stack of cards, 9 cards are blue and the rest are red. If 2 cards are to be chosen at random from the stack without

by VJesus12 » Mon Mar 22, 2021 10:18 am

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In a stack of cards, 9 cards are blue and the rest are red. If 2 cards are to be chosen at random from the stack without replacement, the probability that the cards chosen will both be blue is 6/11. What is the number of cards in the stack?

A. 10
B. 11
C. 12
D. 15
E. 18

Answer: C

Source: GMAT Prep
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