This activity for reviewing simple probability works well for student pairs or groups of three.
Hand out the student cards (the ones with the fractions) to each group along with scratch paper.
Then take out the word problem cards. Show one card to the students via your overhead, smartboard, or document camera. Give them a few minutes to work the problem and then say "Hold it up!"
Each group should then hold up the fraction card which matches the problem that you showed them. Not all cards will be used and at least one answer is the "not here" answer choice.