Brainteaser for September 2, 2011

Brainteaser for September 2, 2011 Question: There are 100 students applying for summer jobs in a university's geology/geography department. Ten of the students have never taken a course in either geology or geography. Sixty-three students have taken at least one geology course. Eighty-one have taken at least one geography course. What is the probability that of the 100 applicants, a randomly selected student has taken either geography or geology, but not both? How many students have taken at least one course in both subjects? Click here to check your answer. Find more Brain Teasers, Puzzles and Games to challenge the mind at The Brainteasers Network

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