Question

A company is testing a new medicine for migraine headaches. In the study, 150 women were given the new medicine and an additional 100 women were given a placebo. Each participant was directed to take the medicine when the first symptoms of a migraine occurred and then to record whether the headache went away within 45 minutes or lingered. The results are recorded in the following table:
(a) If a study participant is selected at random, what is the probability she was given the placebo?
(b) If a study participant is selected at random, what is the probability her headache went away within 45 minutes?
(c) If a study participant is selected at random, what is the probability she was given the placebo and her headache went away within 45 minutes?
(d) If a study participant is selected at random, what is the probability she was given the placebo or her headache went away within 45 minutes?


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  • CreatedApril 27, 2015
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