Question

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 have a heart attack and the test predicts it?

0.099



0.201



0.231



0.469

Answer 1

0.469

Explanation:

Answer 2

Hence, the probability that Erin will have a heart attack and the test predicts it is:

0.469

Explanation:

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%.

The probability that she will have an heart attack and the test predicts it is:

70% of 67%.

`=(70)/(100)* (67)/(100)\\\\=0.469`

Hence, the probability that Erin will have a heart attack and the test predicts it is:

0.469