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Question

Suppose that a certain college class contains 58 students. Of these, 31 are juniors, 28  are chemistry majors, and 11  are neither.  A student is selected at random from the class.  

(a) What is the probability that the student is both a junior and a chemistry major?

(b) Given that the student selected is a junior, what is the probability that he is also a chemistry major?  

 

Write your responses as fractions. 

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