What is the probability that at least two persons out of a group of three persons were born in the s...........

Mathematics (NDA) Probability

What is the probability that at least two persons out of a group of three persons were born in the same month (disregard year)?

$\frac{33}{144}$

$\frac{17}{72}$

$\frac{1}{144}$

$\frac{2}{9}$

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Explanation:

$p(none \: born\: in\: same\: month)=\frac{12\times11\times10}{12\times12\times12}$
$p(at\: least\: two\: born\: in\: same\: month)=1-\frac{12\times11\times10}{12\times12\times12}=\frac{144-110}{144}=\frac{72}{12}$

By: Munesh Kumari

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What is the probability that at least two persons out of a group of three persons were born in the s...........

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Explanation:

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