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How many ways can 10 letters be posted in 5 post boxes, if each of the post boxes can take more than 10 letters?









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Option(A) is correct

Each of the 10 letters can be posted in any of the 5 boxes.

So, the first letter has 5 options, so does the second letter and so on and so forth for all of the 10 letters.

i.e.$ 5×5×5×….×5$ (up-to 10 times)

$= 5^{10}$

(1) Comment(s)


why is it not $10^5$ !!!!!!.......Can someone explain?