In a certain class,22 pupils take one or more of chemistry, economics and government.12 take economics (E),8 take Government and 7 take chemistry. Nobody takes economics and chemistry and 4 pupils take economics and government.
Draw a Venn diagram to illustrate the information.
How many pupils
Both chemistry and government.
Government only.
The Venn diagram would look like this:
E | G | C
-----------------
4 | 4 | 7
-----------------
The number of pupils who take both chemistry and government is 4, and the number of pupils who take government only is 4.