Mathematics, 03.03.2021 14:10 glamorouspotato1251

In a group of 60 secondary school science teachers. 30 teaches biology, 27 teaches Physics and 21 teaches Chemistry, 12 teaches both Biology and Physics but none teaches both biology and Chemistry. How many teaches Chemistry and Physics and how many teaches only Physics.

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In a group of 60 secondary school science teachers. 30 teaches biology, 27 teaches Physics and 21 te...