Posted by Jennifer W. on Friday, May 24, 2013 at 2:15pm.
A drug trial is testing the effectiveness of two drugs. If 40 patients are given Drug A, 80 patients are given Drug B, and 50 patients are given a placebo, what is the probability that a patient will not be given a placebo?

Algebra227  Steve, Friday, May 24, 2013 at 2:47pm
120/170
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