3. At a certain university, 30% of the students major in mathematics. Of the students majoring in mathematics, 60% are males. Of all the students at the university, 70% are males.
a. What is the probability that a student selected at random in the university is male and majors in mathematics?
b. What is the probability that a randomly selected student in the university is female or majors in mathematics or both?
a. To get the probability that a student selected is male and majors in mathematics, we'll multiply the probabilities of 30% major in mathematics and 60% males in major in ...
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