Question
A jar contains 9 purple balls, 6 brown balls and 5 orange
balls. Two balls are taken at random. What is the probability that at least one of them is orange?Solution
Total balls = 9 + 6 + 5 = 20
Non-orange balls = 9 + 6 = 15
Required probability = 1 - (15/20) × (14/19)
= 1 - (210/380)
= 1 - (21/38)
= 17/38
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