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**elenaas** . A university requires its biology majors to take a course called Bio research. The prerequisite for this course is that all students must have taken either a statistics course or a computer course. by the time they are juniors, 52% of the biology majors have taken statistics, 23% have had a computer course and 7% have done both.

a. What percent of the junior biology majors are ineligible for bioresearch?

b. What is the probability that a junior Biology major who has taken a statistics has also taken a computer course?

c. Are taking these two courses disjoint events? Explain.

d. Are taking these two courses independent events? Explain.