Question
A bag contains 4 red balls, 5 blue balls, and 3 green
balls. Two balls are drawn randomly. What is the probability that both are blue?Solution
Total balls = 4 + 5 + 3 = 12. Total ways to choose 2 balls = 12C2 = 66. Ways to choose 2 blue balls = 5C2 = 10. Probability = 10 / 66 = 5 / 33. Correct Option: d
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