Posted by **Kristine** on Tuesday, January 8, 2013 at 10:00pm.

The probability of rain falling on the roof of Adam’s dorm on any given day is 0.15. The probability of rain falling on the lecture hall is 0.20. On days when rain strikes the dorm roof, it has a 0.90 probability of also striking the lecture hall roof. On a day when rain does not strike the dorm roof, what is the probability of rain striking the lecture hall roof?

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