# Math- probability

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Suppose 80% of kids who visit a doctor have a fever, and 30% 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? Round to three decimal places.

• Math- probability -

F=fever
S=sore throat

P(F)=80%
P(S|F)=30%

But
P(S|F)=P(S∩F)/P(F)
P(S∩F)=P(S|F)*P(F)=30%*80%=0.24

• Math- probability -

.24

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