At small town high there are 100 students,each of whom takes atleast one of Biology,Chemistry,or physics.There are 50 student in Biology,60 in chemistry,and 70 in Physics.If 24 students are enrolled in exactly two of the classes,how many students are in all three?

Answer 1

50+60+70-24-x = 100

Draw your Venn diagram to see why.

Answer 2

There are 204 students in all three

Answer 3

34