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-   -   What is the probabilty that exactly 3 of the 20 will be HIV positive? (https://www.askmehelpdesk.com/showthread.php?t=469114)

  • May 5, 2010, 06:40 PM
    larso121212
    What is the probabilty that exactly 3 of the 20 will be HIV positive?
    Suppose we have a group of 10 light users and 10 heavy users.
  • May 6, 2010, 01:00 AM
    Unknown008

    There is not enough information...

    We need the probability that a light user is positive/negative and the probability that a heavy user is positive/negative.

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