If four balls are picked at random, what is the probability that two are green and two are blue?

Q: If four balls are picked at random, what is the probability that two are green and two are blue?

Total number of outcomes = 10c4 = 210 Favourable number of outcomes = 3c2 x 2c2 = 3 x 1 = 3 ∴ Required probability = 3/210 = 1/70

1/18
1/70
3/5
1/2

Correct Answer: 1/70

Explanation:

Total number of outcomes = ¹⁰c₄ = 210
Favourable number of outcomes = ³c₂ x ²c₂ = 3 x 1 = 3
∴ Required probability = 3/210 = 1/70

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