Jamboree Question of the Day - Day 88, Feb 8th 2011

There are 5 letters and 5 corresponding envelopes. If we put the 5 letters into the envelopes at random, what is the probability that only one letter goes into the correct envelope?

A) 1/3

B) 7/9

C) 1/4

D) 5/9

E) 4/9

Solution (Posted on Feb 9th):

C is the answer.

1/5 * 3/4*2/3*1/2 * 5 = ¼