in a certain class 22 pupils took one or more of chemistry economics and government.12 took economics, 8 took government and 7 took chemistry. Nobody took economics and chemistry and 4 pupils took economics and government.
how many pupils took;
1. both chemistry and government
2. government only
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in a certain class 22 pupils took one or more of chemistry economics and government.12 took economics, 8 took government and 7 took chemistry. Nobody took economics and chemistry and 4 pupils took economics and government.
how many pupils took;
1. both chemistry and government
2. government only
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1
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