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 p

Question

3 years ago

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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 p

atients are given a placebo, what is the probability that a patient will NOT be given a placebo?
A. 5/17
B. 10/17
C.2/17
D.7/17

Mathematics

1 answer:

Vsevolod [243] · Answer 1 · 2021-12-30T15:58:48+03:00

So, to find the answer you'd first add up how many patients you have:
20+50+100 = 170.
In a fraction your total would go on the bottom. Then you'd take how many patients are taking a real drug, which is represented by 20+50 = 70. This number would go on top.

So, the probability of a patient NOT getting a placebo is 70/170. Simplified would be 7/17.

The answer is D. 7/17.