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

Correct Answer: 1024

Explanation:

First letter can be posted in 4 letter boxes in 4 ways. Similarly second letter can be posted in 4 letter boxes in 4 ways and so on.


Hence all the 5 letters can be posted in = 4 x 4 x 4 x 4 x 4 = 1024


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