A bag contains 3 red, 4 white and 5 black balls. Three balls are drawn at random. The probability of being their different colours is [RPET 1999]

A bag contains 3 red, 4 white and 5 black balls. Three balls are drawn

1.	A bag contains 3 red, 4 white and 5 black balls. Three balls are drawn at random. The probability of being their different colours is [RPET 1999]
A.	\[\frac{3}{11}\]
B.	\[\frac{2}{11}\]
C.	\[\frac{8}{11}\]
D.	None of these
Answer» B. \[\frac{2}{11}\]

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A bag contains 3 red, 4 white and 5 black balls. Three balls are drawn at random. The probability of being their different colours is [RPET 1999]

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