PROBABILITY HELP?

Posted on 2015-09-07 06:45:00 in Math by BRANDY

10 Mg Atorvastatin Placebo

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Headache: 15 17
No Headache: 17 3

If two different subjects are randomly selected, find the probability that they both use placebos?

A) 0.85
B) 0.46
C) 0.35
D) 0.32
E) 0.8

If one of the 100 subjects randomly selected, find the probability of getting someone who was given a placebo or did not have a headache?

A) 0.67
B) 0.33
C) 0.73
D) 0.85
E) 0.97

If one subject was randomly selected, find the probability that he or she was treated with 10 mg of atorvastatin, given that the subject had a headache?

A) 0.469
B) 0.873
C) 0.188
D) 0.127
E) 0.578

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