Mathematics, 03.12.2019 19:31 ksawyer745

Asurvey of 120 teachers determined the following: 70 had high blood pressure, 40 had heart trouble, 20 had both high blood pressure and heart trouble. what percent of the teachers surveyed had neither high blood pressure nor heart trouble?

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Asurvey of 120 teachers determined the following: 70 had high blood pressure, 40 had heart trouble,...