This Problem Set is a part of the Lesson 1, Unit 8, Grade 7. To introduce the unit on probability, students play a game to collect data about what is inside bags and then make a decision. Learning targets: students can get an idea for the likelihood of an event by using results from previous experiments. Prepare enough bags of blocks so that each group of 4 students can have one bag and all groups will have had a turn with each color of bag after three rounds.