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5 September, 21:16

There are 400 seniors at Salt Lake City High. Fifty of them take Calculus and sixty-five of them take Physics. Of these, thirty-five students take both Calculus and Physics. What is the probability that a randomly selected student takes Calculus or Physics?

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  1. 6 September, 00:49
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    Hi. 50 + 65 - 35 = 80 is the number of the students who take one of subjects or both of theme. 80 - 35 = 45 is the number of the students who take just one of subjects. 45 : 400 = 0.1125
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