In a class of 450 students, 300 are taking a mathematics course and 260 are taking a science course. If 140 of these students are taking both courses, how many students are not taking either of these courses?

a) 30
b) 40
c) 110
d) 140

Question

In a class of 450 students, 300 are taking a mathematics course and 260 are taking a science course. If 140 of these students are taking both courses, how many students are not taking either of these courses?

a) 30
b) 40
c) 110
d) 140

anonymous · Answer

tha answer is d

gw2011 · Answer

I believe the answer is (a) 30.  Here is the reason why:

Math=300
Science=260

This gives a total of 560 which includes students taking both math and science.  Therefore, since 140 are taking both, you subtract 140 from 560 and you get 420.  The difference between 450 and 420 is 30 which means that 30 students are not taking either math or science.