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We are asked to find the number of ways to post 5 letter in 7 letter boxes. It can be done in 7^5 ways . Why not in 5^7 ways? ​​​​​​

Answer» We are asked to find the number of ways to post 5 letter in 7 letter boxes. It can be done in 7^5 ways . Why not in 5^7 ways?
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