Question

According to the Center for disease control, 15% of US adults are estimated to have a chronic kidney disease. A random sample of 150 US adults are selected. What is the probability that exactly 35 have chronic kidney disease

Answer 1

Answer:

$P(X=35) =0.2\%$

Step-by-step explanation:

From the question we are told that

Sample space n = 150

Sample  percentage p = 0.15

Generally people without the disease in the set is give as X

$X= 1-p$

$X= 0.85$

35 have kidney disease,

$P(X=35) = C(150,35)*(0.15)^35*(0.85)^115$

$P(X=35) = 0.0021$

$P(X=35) =0.2\%$