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Math Help - Probability

  1. #1
    Junior Member elenaas's Avatar
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    Probability

    . 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.
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  2. #2
    Super Member
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    Quote Originally Posted by elenaas View Post
    . 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.
    B - set of bio-majors
    S - set of stat students
    C - set of comp science

    Draw a Venn Diagram
    You are given following in % terms
    n(B), n(B/\S), n(B/\C),n(B/\S/\C)

    All questions follow from these directly. For part (d) Check P(SC) = P(S)P(C)
    for
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