The Number Of Ways In Which We Can Post 5 Letters In 10 Letter Boxes Is

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Question

The number of ways in which we can post 5 letters in 10 letter boxes is

Solution

Correct option is

105

We can post the first letter in 10 ways, the second letter in 10 ways and so on. Thus, the number of ways of posting 5 letters in 10 letter boxes is 10 × 10 × 10 × 10 × 10 = 105.

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