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
30 + 10 + 90 = 130 patients total
30 + 10 = 40 patients who ARE given a drug
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simplify 40/130 for your answer
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Yes, you are correct.
okay, thank you.
Happy to help!
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?
To calculate the probability that a patient will not be given a placebo, we need to find the total number of patients who are not given a placebo and divide it by the total number of patients.
In this trial, we know that 30 patients are given Drug A, 10 patients are given Drug B, and 90 patients are given a placebo. Therefore, the total number of patients who are not given a placebo is 30 + 10 = 40.
The total number of patients in the trial is 30 + 10 + 90 = 130.
Now, we can calculate the probability by dividing the number of patients who are not given a placebo (40) by the total number of patients (130):
Probability = Number of patients who are not given a placebo / Total number of patients
= 40 / 130
= 4/13
Therefore, the probability that a patient will not be given a placebo is 4/13.
So, the correct answer is A. 4/13.