Question

The angle measures 22°, 62°, 118°, and 158° are written on slips of paper. You choose two slips of paper at random.

What is the probability that the angle measures are supplementary? Enter your answer as a fraction.

Answer 1

There are 6 ways to choose 2 items from a set of 4.
Of these 6 ways, there are only 2 that are supplementary.
Therefore, the probability is 1/3.