This Instructional Activity is a part of the Lesson 20, Unit 8, Grade 7. In this activity, students begin by practicing their understanding of proportions and and probabilities by examining the data set they have available. In the fourth problem, students obtain a sample from the population using tools they chooseand examine the sample they selected to compare it to the expected proportions and probabilities calculated in the first 3 problems. The problems are intended for students to use their own data set to answer. Although they are kept in pairs for the entire lesson, this activity should be done individually.