Question
A bag contains ‘x’ white balls and 3 black balls. If
the probability of getting a white ball is 4/5, then find the probability of getting different coloured balls when two balls are drawn randomly from the bag.Solution
x/(x + 3) = 4/5
→ 5x = 4x + 12 → x = 12
Total balls = 15
P = (12C1 × 3C1)/(15C2) = (12×3)/105 = 36/105 = 12/35
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