Question
A bag contains ‘x’ blue balls and 9 yellow balls. If
the probability of getting a blue ball is 3/4, then find the probability of getting different coloured balls when two balls are drawn randomly from the bag.Solution
x/(x + 9) = 3/4
→ 4x = 3x + 27 → x = 27
Total balls = 36
P = (27C1 × 9C1)/(36C2) = (27×9)/630 = 243/630 = 27/70
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