Question
A bag contains ‘x’ blue balls and 5 yellow balls. If
the probability of getting a blue ball is 2/3, then find the probability of getting different coloured balls when two balls are drawn randomly from the bag.Solution
x/(x + 5) = 2/3
→ 3x = 2x + 10 → x = 10
Total balls = 15
P = (10C1 × 5C1)/(15C2) = (10×5)/105 = 50/105 = 10/21
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