Question

There are 250 students taking either band or chorus. If there are 180 students taking band and 60 students in both band and chorus, how many students are in just chorus?

10
60
70
120

Answer 1

Band total equals \[b _{t}=180\]Band only equals\[b _{t}-60\]
Chorus total equals\[c _{t}\]Chorus only equals\[c _{t}-60\]
Band and Chorus equals\[b _{c}=60\]

So band only + chorus only + band and chorus equals 250 students.\[(180-60)+60+(c _{t}-60)=250\] Which becomes\[c _{t}=130\]So chorus only equals 130-60=70 students

Answer 2

thank you so much!