Envelopes and Probability
Albert has 4 envelopes and 4 letters, with each letter corresponding to a different envelope. If he puts each letter inside a random envelope such that each envelope contains exactly 1 letter, what is the probability that no letter is inside its corresponding envelope? Express your answer as a common fraction.
This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try
refreshing the page, (b) enabling javascript if it is disabled on your browser and,
finally, (c)
loading the
non-javascript version of this page
. We're sorry about the hassle.
0 solutions
No explanations have been posted yet. Check back later!