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Quantitative Aptitude

Bayes' Theorem

Two toys are ...

Question

Two toys are drawn from a bag containing 21 toys numbered from 1 to 21 (without replacement). Find the probability that both the toys will show even numbers.

A

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B

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C

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D

None of these

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Solution

The correct option is C

P(E) = $\frac{10 \times 9}{21 \times 20} = \frac{3}{14}$

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