Question

PLEASE HELP I WILL MARK YOU BRAINLIEST!!!!

On discovering that her family had a 70% risk of heart attack, Erin took a treadmill test to check her own potential of having a heart attack. The doctors told her that the reliability of the stress test is 67%. What is the probability that Erin will not have a heart attack and the test predicts that she will?

A. 0.099
B. 0.201
C. 0.231
D. 0
.469

Answer 1

Answer:

the answer is C.

Step-by-step explanation:

Answer 2

Answer:

0.099, or 9.9%

Step-by-step explanation:

She has a 70% chance to have a heart attack, therefore, she has a 30% chance that she will not.

The accuracy of the test is 67%, which means, which means there is a 33% of a false diagnosis.

The chance of both events occurring is 0.3 * 0.33, which is 0.099.