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