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Quantitative Aptitude

Probability

Four letters ...

Question

Four letters are written of 4 different persons. Addresses of these 4 persons are written on 4 envelopes. What is the probability that all letters go to correct envelopes?

A

0

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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 B

$n (A) = 1, n (S) = 4 \times 4 \times 4 \times 4 = 256 P (A) = \frac{1}{256}$

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