Question 1041973: A hospital laboratory uses two tests to classify each sample of blood. The first test correctly identifies the blood type 57 percent of the time, and the second test correctly identifies the blood type 60 percent of the time. If the probability is 0.62 that at least one of the tests correctly identifies the blood type, what is the probability that both tests correctly identify the blood type?
Answer by jorel555(1290)   (Show Source):
You can put this solution on YOUR website! If the first test is correct 57% of the time, and the second is correct 60% of the time, and they are both correct 55% of the time, then the chance that at least one is correct is 62% of the time.
57+60-62=55
57+60-55=62
The chance that they are both correct is .55, or 55%. ☺☺☺☺
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