Given: Candidate failed in Chemistry =23% Candidate failed in Physics =34% Candidate failed in both subject =6% Calculation: Candidate failed in Chemistry =(23−6)%=17% Candidate failed in Physics =(34−6)%=28% Candidate failed in both =6% ∴ Total candidate failed in exam =(17+28+6)=51% ∴ Percentage of passed students in the exam =(100−51)%=49%