Question

There are 11 sixth graders, 10 seventh graders, and 8 eighth graders in a gym class. The gym teacher randomly selects one student to collect balls. In how many ways can choosing not a seventh grader occur?

Answer 1

19

Explanation:

Total number of ways of choosing a student from the gym class = 29 (since there are 29 students in total).

Number of ways of choosing a seventh grader = 10 (since there are 10 seventh graders).

Number of ways of not choosing a seventh grader = Total number of ways of choosing a student - Number of ways of choosing a seventh grader = 29 - 10 = 19