Posted by **Lisa** on Monday, April 18, 2011 at 7:45pm.

A secretary addresses 50 different letters and envelopes to 50 different people, but the letters are randomly mixed before being put into envelopes. What is the probability that at least one letter gets into the correct envelope?

- Probability/Statistics -
**Tee**, Thursday, May 5, 2011 at 11:34pm
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