A bag contains 4 red, 5 blue, and 6 green balls. Two balls are drawn at random. What is the probability both are green?
- 1/5
- 1/6
- 1/7
- None of these
Explanation
Total balls = 4 red + 5 blue + 6 green = 15 balls
Ways to draw 2 balls from 15 = C(15,2) = 15×14/2 = 105
Ways to draw 2 green from 6 = C(6,2) = 6×5/2 = 15
Probability both green = 15/105 = 1/7
Last verified on 13-06-2026
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