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JordiPedroza
 one year ago
The probability that a student takes an English class and a math class is 0.084. The probability that a student takes an English class is 0.49. What is the probability that a student takes a math class given that the student is taking an English class?
0.084
0.406
0.49
0.171
I am confused because of the last sentence. I think the answer is .171
JordiPedroza
 one year ago
The probability that a student takes an English class and a math class is 0.084. The probability that a student takes an English class is 0.49. What is the probability that a student takes a math class given that the student is taking an English class? 0.084 0.406 0.49 0.171 I am confused because of the last sentence. I think the answer is .171

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phi
 one year ago
Best ResponseYou've already chosen the best response.1you need to use the formula for conditional probability http://www.mathgoodies.com/lessons/vol6/conditional.html

JordiPedroza
 one year ago
Best ResponseYou've already chosen the best response.1cool, I did that. .84/.49=.171

phi
 one year ago
Best ResponseYou've already chosen the best response.1Yes, \[ Pr(M  E) = \frac{Pr(M \& E)}{Pr(E)} \]
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