in a class of 60 student, the number of student who passed biology is 6 more than the number who passed chemistry every student passed both at least one of the two subjects and 8 student passed both subject

Firstly we need to find how many students passed chemistry or biology

60-8=52 studdnts passed biology or chemistry

Let number of students who passed chemistry is x, than number of students who passed biology is 52-x.

So, 23 students passed chemistry, than

23+6=29 students passed biology

23 students passed chemistry and 29 students passed biology

sorry, i can't understand your question. will later if you describe more clearly!

: )