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%. The test predicted that Erin will not have a heart attack. What is the probability after the test was taken that she will have a heart attack?

A. 0.4051

B. 0.5010

C. 0.4653

D. 0.6632

Answer 1

This is your question right?

Answer 2

yeah

Answer 3

Okay

Answer 4

im running out of time bro so nevrmind if u dont know it :/

Answer 5

My fault, im kinda pre-occupied right now, but i'll still help

Answer 6

She has a 67% chance of still having a heart attack out of 100%

Answer 7

So with that said multiply 67/100 by 70/100

Answer 8

i did that already. nd got 4690/1000 or 469/1000.

Answer 9

Its 469/1000

Answer 10

Now change it into a decimal

Answer 11

0.469?

Answer 12

You have your answer!

Answer 13

i dont get it. is it supposed to be C then but just rounded up?

Answer 14

Yeah, your answer is C.

Answer 15

thankyou. your awesome

Answer 16

No problem! :)