Question

There are 12 pupils in a class.

They are asked whether they have a brother or a sister.
9 say they have a brother
7 say they have a sister
2 say they have neither
Fill in the Venn Diagram.

Answer 1

b+s=6

s=1

b=3

and outside =2

Answer 2

sorry for messy drawing but im tryin to help ;/