in a class of 50, 30 offer economics ,17 offer government

3 answers

It would help if you proofread your questions before you posted them. Interesting, class of 50 but only 47 offerings.

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In a class of 50 students 30 offer economic 17 offer government and 7 offer neither economic not government how many students offer both subject
In a class of 50 students, 30 offer economist, 17 offer government. How many students offer both subjects?