# Find the Number of Ways in Which One Can Post 5 Letters in 7 Letter Boxes. - Mathematics

Find the number of ways in which one can post 5 letters in 7 letter boxes ?

#### Solution

Each of the 5 letters can be posted in any one of the 7 letter boxes.
∴ Required number of ways of posting the letters = 7xx7xx7xx7xx7=7^5

Concept: Permutations
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#### APPEARS IN

RD Sharma Class 11 Mathematics Textbook
Chapter 16 Permutations
Exercise 16.2 | Q 42 | Page 16