Question
Quantitative Aptitude Question on Permutations and Combinations
In a class of 100 students, 55 students have passed in Mathematics and 67 students have passed in Physics. The number of students who passed in Physics only is:
A
45
B
22
C
33
D
10
Answer
45
Explanation
Solution
(Math)+(Physics)=55+67=122
⇒(Math)∩(Physics)=22
∴ Only physics passed students =67−22=45
The correct answer is (A): 45