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Mathematics, 24.12.2019 10:31 owlette2001

In how many ways can 3 letters be mailed in 6 mailboxes if each letter must be mailed in a different box? if the letters are not necessarily mailed in different boxes, how many ways are there of posting them? if the letters are mailed at random, and not necessarily in different boxes, what is the probability that all the letters are put in the same mailbox?

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