At a school picnic, 1 junior and 1 senior will be selected to lead the activities

At a school picnic, 1 junior and 1 senior will be selected to lead the activities. If there are 125 juniors and 100 seniors at the picnic, how many different 2-person combinations of 1 junior and 1 senior are possible?

  1. 25
  2. 100
  3. 125
  4. 225
  5. 12,500

Answer

The correct answer is E.

There are 125 juniors who could be chosen. For each of those 125 juniors, there are 100 seniors who could be chosen.

That makes 125 x 100 = 12,500 different pairs of students who could be chosen.