A clothing store has one floor devoted to sweaters. Ninety percent of the sweaters are wool. If the probability that a sweater is a black wool sweater is .63, what percent of the wool sweaters are black?

A clothing store has one floor devoted to sweaters. Ninety percent of the sweaters are wool. If the probability that a sweater is a black wool sweater is .63, what percent of the wool sweaters are black?

A.27%
B.50%
C.70%
D.90%
E. None of the above

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