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Applications of Dot Product

A man has 4...

Question

A man has $4$ sons and there are $5$ schools within his reach. The number ways he cn admit his sons in the school so that no two of them will be in the same school is:

A

{^{5} C}_{4}

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B

{^{5} P}_{4}

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C

5^{4}

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D

4^{5}

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Solution

The correct option is A ${^{5} P}_{4}$
Total schools $= 5$
Total son's $= 4$
Number of ways $=^{5} P_{4}$

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