# Math

a drug trial is testing the effectiveness of two drugs If 30 patients are given Drug A, 10 patients are given Drug B, and 90 patients are given a placebo, what is the probability that a patient will NOT be given a placebo?
A. 4/13***
B. 3/13
C. 9/13
D. 1/13

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1. 30 + 10 + 90 = 130 patients total

30 + 10 = 40 patients who ARE given a drug

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Yes, you are correct.

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2. okay, thank you.

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3. Happy to help!

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4. A drug trial is testing the effectiveness of two drugs. If 50 patients are given Drug A, 20 patients are given Drug B, and 100 patients are given a placebo, what is the probability that a patient will NOT be given a placebo?

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