Questions: A recent study of patients found that of 95 alcoholic patients, 82 had elevated cholesterol levels, and of 305 nonalcoholic patients, 64 had elevated cholesterol levels. If a patient is selected at random, find the probability that the patient is the following. Round your answers to three decimal places.
Part 1 of 3
P( alcoholic with elevated cholesterol) =
Part 2 of 3
P( nonalcoholic) =
Transcript text: A recent study of patients found that of 95 alcoholic patients, 82 had elevated cholesterol levels, and of 305 nonalcoholic patients, 64 had elevated cholesterol levels. If a patient is selected at random, find the probability that the patient is the following. Round your answers to three decimal places.
Part 1 of 3
P( alcoholic with elevated cholesterol) =
Part 2 of 3
P( nonalcoholic) =
Solution
Solution Steps
Step 1: Calculate \( P(\text{alcoholic with elevated cholesterol}) \)
To find the probability that a randomly selected patient is an alcoholic with elevated cholesterol levels, we use the formula:
\[
P(\text{alcoholic with elevated cholesterol}) = \frac{\text{Number of alcoholic patients with elevated cholesterol}}{\text{Total number of patients}} = \frac{82}{400}
\]
Calculating this gives:
\[
P(\text{alcoholic with elevated cholesterol}) = 0.205
\]
Step 2: Calculate \( P(\text{nonalcoholic}) \)
To find the probability that a randomly selected patient is nonalcoholic, we use the formula:
\[
P(\text{nonalcoholic}) = \frac{\text{Number of nonalcoholic patients}}{\text{Total number of patients}} = \frac{305}{400}
\]
Calculating this gives:
\[
P(\text{nonalcoholic}) = 0.762
\]
Final Answer
\( P(\text{alcoholic with elevated cholesterol}) = \boxed{0.205} \)