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January 31, 2015

January 31, 2015

Posted by **melissa** on Thursday, March 19, 2009 at 2:37pm.

- probabilty -
**Damon**, Thursday, March 19, 2009 at 4:58pmThis is a problem in "conditional probability".

The probability of E, given F is:

P(E/F) = P (E and F)/ P(F)

Call P(F) = drama = .67 given

Call P(E) = Computer = unknown

the P(EandF) =.14 given

Now the probability that a student takes computer given drama

= .14/.67 = .21

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