Discussion Forum

1)

Data on 450 candidates, who took an examination in Social science, Mathematics and Science is given below:

Passed in all the subjects	167
failed in all subjects	60
Failed in social science	175
Failed in mathematics	199
Failed in Science	191
Passed in Social Science only	62
Passed in mathematics only	48
Passed in science only	52

How many failed in one subject only?

Answer:

Option C

Explanation:

Candidates failed in one subjects only = Total number of candidates - Candidates passed in all subject  + Candidates failed in all the subjects + Candidates passed in maths only

= 450 - (167 + 60 +62 +48+52) = 61