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15 December, 19:06

A drug 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?

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  1. 15 December, 21:35
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    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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