Someone has come and removed all the labels and mixed them up.

If you put the labels back on the jars (without knowing the contents), what is the expected number of labels which would match the contents?

The 'expected' result is defined as the average result you'd get if you had a large number of trials. Formally, you calculate it by multiplying every possible result by the probability of getting that result, and then adding all of those terms together.

Posted by friedlinguini on 2002-12-23 09:21:42