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May 30, 2015

Homework Help: math..probabilities

Posted by M.A. on Tuesday, October 26, 2010 at 8:22am.

You type four letters to four different people and address the envelopes. If you then insert the letters into the envelopes randomly, what is the probability that exactly three letters will go into the correct envelopes?
1/2
1/3
1/4
0

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