Re: Simple (probability?) question.


<vanwamelen@xxxxxxxxx> wrote in message
news:1114028948.892870.36540@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>I can't figure out this simple seeming question:
>
> Suppose people can have one of two preferences: A or B (Coke or Pepsi
> if you prefer). On average 50% of people prefer A, but 60% of redheads
> prefer A and 75% of catholics prefer A. What percentage of redheaded
> catholics prefer A?
>
> Any thoughts?
>
> Paul van Wamelen
>

Note that it is possible that 0% of redheaded catholics prefer A, and it is
possible that 100% of them do. It is also possible that there are no
redheaded catholics in your population.

-Bill



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