Question

19. Mr. Green teaches band, choir, and math. This year, he has 57 students that take at least one of (3 points)

his classes. He teaches band to 25 students. There are 9 students who have Mr. Green for math
and nothing else. Use the Venn diagram below:
Math
7
3
11
17
Band
Choir
How many students take exactly 2 classes with Mr. Green?

Answer 1

The answer is "17 students with Mr. Green take exactly two courses".

Explanation:

Following are the calculation to this question:

Alone band 11

Alone chorus 17

Choir and band alone 4

7 Maths alone and the band

Choir and Math alone 6

Chorus and Math Band 3

mathematics alone 9 +11+4+10+6+17 + M = 57

so

2 classes = 4+7+6 = 17

So, there are 17 students with Mr. Green take exactly two courses.