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18 October, 13:11

Q and r are not mutually exclusive events. if p (q) = 0.12, p (r) = 0.25, and p (q and r) = 0.03, find p (q or r).

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  1. 18 October, 13:17
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    So we are given the probabilities of q and r:

    p (q) = 0.12

    p (r) = 0.25

    p (q and r) = 0.03

    Actually to find for p (q or r), this simply means to add all the values of p (q). p (r) and p (q and r). If we are to draw a bubble diagram, the p (q and r) is the bubble intersection p (q) and p (r). We know that the word "OR" takes up all in the bubble diagram. Therefore:

    p (q or r) = p (q) + p (r) + p (q and r)

    Substituting the given values into the equation:

    p (q or r) = 0.12 + 0.25 + 0.03

    p (q or r) = 0.40
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