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The probability that 2 white and 1 black ball will be drawn, is

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Three boxes contain respectively 3 white and 1 black, 2 whit

There are two urns, one containing two white balls and four

A box contains 2 white balls, 3 black balls and 4 redballs.

A bag contains 7 green and 5 blackballs.

Three balls are dr

Three balls are dr

A bag contains 4 red and 3 blackballs.

A second bag contain

A second bag contain

3 balls are drawn randomly from a bag contains 3 black, 5 re

A box contains 4 red balls and 6 blackballs.

Three balls ar

Three balls ar

A bag contains 2 white balls, 3 black balls and 4 redballs.

A box contains 2 white balls, 3 black balls and 4 redballs.

A box contains 24 identical balls of which 12 are white and