Question

In a combined test in English and Physics; 36% candidates failed in English; 28% failed in Physics and 12% in both; find:
the percentage of passed candidates

Answer 1

Candidates failed only in English
= 36% - 12%
= 24%
Candidates failed only in Physics
= 28% - 12%
 =16%
Candidates failed in both subjects = 12%
Total failed candidates 
= 24% + 16% + 12%
= 52%
Percentage of passed candidates
= 100% - 52%
= 48%