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In How Many Ways Can 4 Letters Be Posted in 5 Letter Boxes? - Mathematics

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In how many ways can 4 letters be posted in 5 letter boxes?

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Solution

Each of the letter can be posted in anyone of the letter boxes.
This means that every letter can be posted in 5 ways.
∴ Total number of ways of posting 4 letters = `5xx5xx5xx5=5^4`

Concept: Permutations
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APPEARS IN

RD Sharma Class 11 Mathematics Textbook
Chapter 16 Permutations
Q 1 | Page 45

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