Question 79288

1. There are 72 members in the orchestra, but 12 are also in chorus so those students don't count here. 72-12 = 60
2. There are 42 members in the chorus, but 12 are also in orchestra so those students don't count here. 42-12 = 30
3. We know that there are 140 students total, we also know that there are a total of 114 (72+42) in orchestra and chorus, but 12 students are counted twice in that total because they are a member of both. So, 114-12=102 and then you can subtract that number from 140 to get 38.
8. In #3 we figured out this answer. There are a total of 114 members in orchestra and chorus, but 12 are counted twice, so 114 - 12 = 102.
I hope this helps!