Question

9. Some patients participated in a clinical trial for a
new drug to treat osteoporosis. A patient is selected
at random. The probability that the patient had no change in his bone mass density is
7/13, the probability that he had a slight reduction in his bone mass density is
1/k
and the probability that he had
a significant reduction in his bone mass density is 1/2k
Find the value of k.
​

Answer 1

Some patients participated in a clinical trial for a

new drug to treat osteoporosis. A patient is selected

at random. The probability that the patient had no change in his bone mass density is

7/13, the probability that he had a slight reduction in his bone mass density is

1/k

and the probability that he had

a significant reduction in his bone mass density is 1/2k

Find the value of k.