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A. 1/20 B. 1/21 C. 1/22 D.1/23 An urn contains 5 white balls, 4 black balls and 3 red balls. If 3 balls are drawn

A. 1/20

B. 1/21

C. 1/22

D.1/23

An urn contains 5 white balls, 4 black balls and 3 red balls. If 3 balls are drawn simultaneously, find the probability that all are white balls.

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