Statistics And Probability Question 260
A bag contains 3 red, 4 white and 5 black balls. Three balls are drawn at random. The probability of all their different colours is
[RPET 1999]
Options:
A) $ \frac{3}{11} $
B) $ \frac{2}{11} $
C) $ \frac{8}{11} $
D) None of these
Show Answer
Answer:
Correct Answer: A
Solution:
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Probability $ =\frac{^{3}C_1 \cdot ^{4}C_1 \cdot ^{5}C_1}{^{12}C_3} $ $ =\frac{3}{11} $ .
BETA
