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Math Help - probability of cancer

  1. #1
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    probability of cancer

    The PSA test is a simple blood test for prostate cancer in men. It is cheap,
    but it is not very accurate. According to:
    The PSA, prostate cancer and you – VCU Department of Family Medicine
    if 100 men are considered:
    (a) How many have cancer?
    (b) Of those with cancer, what percentage test positive? What is the rate
    of false negatives in the population of men with cancer?


    I don't know where to start! Please guide me step by step.
    Thanks a lot.
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  2. #2
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    there is a yellow box in the middle of the article. 100 people are in the box. How many of them have cancer?
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