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
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
- A
$\frac{3}{{11}}$
- B
$\frac{2}{{11}}$
- C
$\frac{8}{{11}}$
- D
None of these
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