statistics
posted by Kendra .
A group of six students all have different grades in statistics. The
median mark in the group is 68. If two of the six students are selected at random, what is the probability that both have marks greater than 68?

The probability of any score > median = 50% = .5
The probability of both/all scores occurring is found by multiplying the probabilities of the individual scores.
That should help you.