100 students were asked whether they are taking psychology or biology. 61 were taking pyschology, 18 were taking both and 12 were taking neither. how many were taking biology?

Question

Reiny · Accepted Answer

Make a Venn diagram with two intersecting circles
label "only biology" as x
place 18 in the intersection
place 43 in the "only psychology"
place 12 outside the two circles

x + 18 + 43 + 12 = 100
x = 27

So Biology was taken by 27+18 or 45 students

Archie · Answer

Would pls complete the ans

Hassan · Answer

How many were taking psychology but not biology?