Question

In a class , 40 student like Maths, 50 students like Physics and 60 students like Chemistry. 30 students like both Maths and Physics, 20 students like both Physics and Chemistry and none of them like both Maths of Chemistry . Find the total number of students who like only Maths, only Physics and only Chemistry.
A. 10
B. 40
C. 50
D. None

Answer 1

Correct Answer - C

The number of students who study only Maths =
`40-30 = 10`.
The number of students who study only Physics =
`50 - 50 = 0`.
The number of students who study only Chemistry =
`60 - 20 = 40`.
`:.` The required total number of students `= 10+ 40 = 50`.