Asked by Jake
                There are 30 students in the class. 16 of them study french and 21 study spanish. They all study at least one of the two languages. What is the probability that a student chosen at random studies french only?
            
            
        Answers
                    Answered by
            oobleck
            
    If x study both, then
16+21-x = 30
x = 7
so, 16-7 = 9 study French only
now finish it off
    
16+21-x = 30
x = 7
so, 16-7 = 9 study French only
now finish it off
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