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.
A. 0.099
B. 0.201
C. 0.231
D. 0.469
Thanks to anyone helping.
2 answers:
You might be interested in
See photo. Hope it helps
now.. hmmm -8/15 is rather ambiguous, since the negative sign is in front of the rational, and either 8 or 15 can be negative, now, we happen to choose the 8 to get the minus, but it could have been 8/-15
ok, well hmm so, the issue boils down to
now, let's take a peek at the second angle, angle β
now, with that in mind, let's use the angle sum identity for cosine