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Two cards are drawn successively with replacement from a well shuffled pack of 52 cards. The mean of number of kings is
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The correct answer is:
$\frac{2}{13}$
Here, $n=2, p=\frac{1}{13}$ and $q=\frac{12}{13}$
Mean, $n p=2 \times \frac{1}{13}=\frac{2}{13}$
Mean, $n p=2 \times \frac{1}{13}=\frac{2}{13}$
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