Direction: Study the information carefully to answer the question that follow.
A basket contains 3 blue, 2 green and 5 red balls.
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If four balls are picked at random, what is the probability that two are green and two are blue ?
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- 1/18
- 1/70
- 3/5
- 1/2
- None of the above
Correct Option: B
Total number of outcomes = 10c4 = 210
Favourable number of outcomes = 3c2 x 2c2 = 3 x 1 = 3
∴ Required probability = 3/210 = 1/70
