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Suppose 80% of kids who visit a doctor have a fever, and 25% of kids with a fever have sore throats. What's the probability that a kid who goes to the doctor has a fever and a sore throat?
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Nov 5, 2018
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Suppose 80% of kids who visit a doctor have a fever, and 25% of kids with a fever have sore throats. What's the probability that a kid who goes to the doctor has a fever and a sore throat?
Mathematics
middle-school
Ian Joyce
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So what you do is find 25% of 80% of 100%. So, 8 out of 10 kids have a fever, and 2 out of 8 kids have a sore throat. So you would have 5 out of 10 kids have a sore throat, and a fever
Terril Thomas
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Nov 10, 2018
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Terril Thomas
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