The universal set in the diagram is the set of integers 1-15. place the integers in the correct place on the venn diagram. A and B is 1,5,3,and 15
B and C is 9
The multiples of three are 6 and 12
to the left of bubble C is 14 and 8
To the right of bubble C is 4 and 10
and in the top right corner is 2.
Hope that helped, its correct on edge.