In a class of 60 student , the number of students who passed Biology 6 more than the number who passed chemistry. Every student passed at least one of the two subjects and 8 students passed both subjects

Answer 1

b = bio , c = chem , B = both

b = c + 6

b + c + B = 60 ... b + c = 52

substituting ... c + 6 + c = 52 ... c = 23

substitute back to find b