I need assistance with following problem along with steps to arrive at the solution/answer.

Three envelopes are addressed for 3 secret letters written in invisible ink. A secretary randomly places each of the letters in an envelope and mails them. What is the probability that at least 1 person receives the correct letter?

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Suppose 3 envelopes are denoted as A, B, C and the 3 secret letters are denoted as a, b, c. They should be put in envelopes A,B,C, ...

Solution Summary

This is a probability problem regarding randomly mailed letters. The solution explains how to solve the problem and shows the answer through step by step calculation.

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... Here the probability used is 20/453 ... PAPER & PLASTEIC 566 491 0 BAGS 173 43 45 0 322224--UNCOATED PAPER & MULTIWALL BAGS 174 51 56 0 322232--ENVELOPES 175 322233 ...

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