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The probabili...

Question

The probability of getting a boy in a class is $0.6$ and there are $45$ students In a class, then find the number of girls in the class.

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Solution

Given Probability of getting a boy is $0.6$
$⟹$ probability of getting a girl is $1 - 0.6 = 0.4$
No of girls in the class $= 45 \times 0.4 = 18$

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