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

Question

3 years ago

10

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?
A. 0.099

B. 0.201

C. 0.231

D. 0.469

Thanks to anyone helping.

Mathematics

2 answers:

astra-53 [7] · Answer 1 · 2022-05-18T18:00:38+03:00

astra-53 [7]3 years ago

8 0

The answer is .469 its just simply both percentages as percents multiplied together so .7*.67= .469

Nostrana [21] · Answer 2 · 2022-05-18T20:11:35+03:00

Nostrana [21]3 years ago

8 0

The answer is 0.469,
You just multiply the percentages. But before you do, make them a simple number. (not percentage).
0.7 × 0.67 = 0.469.