In 2012, there were three subjects i.e. A, B and C in syllabus. 20% students passed in subject A only, 30% students passed in subject B only and 20% students passed in subject C only. If number of st…

Question

In 2012, there were three subjects i.e. A, B and C in syllabus. 20% students passed in subject A only, 30% students passed in subject B only and 20% students passed in subject C only. If number of students passed in all three subjects was 9, then find the number of students who passed in exactly two subjects.

PYQPulse · Accepted Answer

18

PYQPulse · Answer

Explanation: Number of students passed in subject A = 20 100 × 90 = 18 Number of students passed in subject B = 30 100 × 90 = 27 Number of students passed in subject C = 20 100 × 90 = 18 So, number of students who passed in exactly two subjects = 90 − 18 − 27 − 18 − 9 = 18

Answer: A. 18

Explanation