Solved: Oldie but Goodie A secretary types 10 different
Chapter 4, Problem 40(choose chapter or problem)
Oldie but Goodie A secretary types 10 different letters and addresses 10 correspondingenvelopes. If he is in a hurry and randomly inserts the letters into the envelopes, what is theprobability that exactly 9 of the letters are in the correct envelopes? (Based on MathematicsMagazine, Vol. 23, No. 4, 1950)
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