My basic math has failed me. Let's say I have a group of people. I'm
trying to find out what percentage of them meet certain criteria. If
75% of them meet criteria A, and 50% of them meet criteria B, and 5%
of them meet criteria C, what percentage of them meet all three
criteria (ABC)? What's the necessary equation to figure this out?

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Request for Question Clarification by leapinglizard-ga on 04 Dec 2004 07:20 PST

There is no formula. For example, it may be the case that all those
who satisfy A also satisfy C, but it is also possible that no one who
satisfies A can satisfy C. Perhaps neither of these rules is true. It
all depends on the circumstances. Does that answer your question?

leapinglizard

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Clarification of Question by jcharles-ga on 04 Dec 2004 07:36 PST

I guess I should have phrased the question "what percentage of them
are _likely_ to meet all three criteria"? I'm assuming there's a way
to figure out the probabilities.