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kap26 [50]
3 years ago
15

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 not have a heart attack?
A.) 0.099
B.) 0.201
C.) 0.231
D.) 0.469
Mathematics
2 answers:
Ghella [55]3 years ago
8 0
The probability of Erin not having a heart attack according to her family history would be 30%.

The probability of the test predicting correctly is 67%.

Therefore, the probability of the test correctly predicting that Erin will not have a heart attack would be (0.30)(0.67) = 0.201 or 20.1%.
BaLLatris [955]3 years ago
3 0

Answer:

I don't know what the answer is, but the test say B. 201 is wrong

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

Given: The origin is (0, 0), the point P is (2, -5).

We need to use the distance formula.

Distance formula = \sqrt{(x2 -x1)^2 + (y2 - y1)^2} \\

Here x2 = 2, x 1 = 0, y1 =0, y2 = -5

Distance = \sqrt{(2 -0)^2 + (-5 - 0)^2}

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= √(4 + 25)

= √29

The answer is b) √29

Hope you will understand the concept.

Thank you.

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