Question

homework: unit 4 - mean, median and mode, and probability
question 32, 7.4.33
a new drug is being tested that is supposed to lower blood pressure. this drug was given to 300 people and the results are as follows
lower blood pressure 84
higher blood pressure 159
blood pressure not changed 57
if a person is testing this drug, what is the probability that their blood pressure will not change?
the probability is (type a whole number or a simplified fraction.)

Explanation:

Step1: Recall probability formula

The probability formula is $P(A)=\frac{\text{Number of favorable outcomes}}{\text{Total number of outcomes}}$.

Step2: Identify values

The number of people whose blood - pressure did not change is 57 (favorable outcomes), and the total number of people tested is 300 (total outcomes).

Step3: Calculate probability

$P=\frac{57}{300}=\frac{19}{100}$

Answer:

$\frac{19}{100}$