Can someone explain this type of math problem?

elizlan
Thu, 29 May 2008 10:44:49 +0000

Ok at the risk of sounding like a complete idiot, I don’t get how they got this answer on a practice test.

Here’s the question:

Exactly 4 actors try out for the 4 parts in a play. If each actor can perform any one part and no one will perform more than one part, how many different assignments of actors are possible?

They give the Answer 24, I get 16.

Thanks.