Adrug trial is testing the effectiveness of two drugs. if 80 patients are given drug a, 10 patients are given drug b, and 20 patients are given a placebo, what is the probability that a patient will not be given a placebo?

The answer is 9/11.

Step-by-step explanation:

To find the answer you'd first add up how many patients you have:

80+10+20 = 110.

Now find out that how many patients are taking a real drug, which is represented by 80+10 = 90.

So, the probability of a patient NOT getting a placebo is 90/110

Simplified would be 9/11

Thus the answer is 9/11

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