A bag contains 4 white, 7 black and 5 re...

A bag contains 4 white, 7 black and 5 red balls. Three balls are drawn one after the other without replacement. Find the probability that the balls drawn are white, black and red respectively.

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A= shows in the first draw white ball comes up

B= shows in the second draw Black ball comes up

C= shows in thet hird draw Red ball comes up

...

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