parkermatthews parkermatthews

28-04-2017
Mathematics

contestada

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.

Respuesta :

crayonyou crayonyou

28-04-2017

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

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