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In a class 60% are boys and rests are girls. 50% of boys and 25% of girls know cricket. If a student is selected at random and given that the selected student is a cricketer. The probability that the selected student is a girl is

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$\frac{1}{3}$

$\frac{3}{4}$

$\frac{2}{3}$

$\frac{1}{4}$

answer is A.

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Detailed Solution

$n (S) = 30 + 10 = 40$

$n (E) = 10$

$P (E) = \frac{1}{4}$

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