This Problem Set is a part of the Lesson 1, Unit 5, Grade 7. Students understand that a probability is a number between 0 and 1 that represents the likelihood that an event will occur. Students interpret a probability as the proportion of the time that an event occurs when a chance experiment is repeated many times. students are likely to see in their future work with probability and statistics (and particularly if they go on to take an Read through the rules of the game, and demonstrate how to use the paper clip as a spinner.