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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

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.

1 x=22.52

2: 65/39=604+39x

65x-39x=604

26x=604

x=604/26

×=23.23

first one because it can't have a fraction in it

step-by-step explanation: