Mathematics, 12.09.2021 03:40 xeskimopie

Of the 145 students who took a mathematics exam, 80 correctly answered the first question, 81 correctly answered the second question, and 49 correctly answered both questions. How many students did not answer either of the two questions correctly?

Answers: 2

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Of the 145 students who took a mathematics exam, 80 correctly answered the first question, 81 correc...