Posted by Soroban on September 23, 2002 at 13:25:05:
In Reply to: smoker population posted by Brett on September 23, 2002 at 11:34:48:
: Suppose that the population of a certain city is 40% male and 60% female. Suppose also that 50% of the males and 30% of the females smoke. Find the probablility that a smoker is a male.
Boy, this is really hard...
Suppose there 100 people (try it when percents are involved).
Then there are 40 males and 60 females.
50% of the males smoke -- um, that's HALF of them... uh... 20 ?
And "20 out of 100" is...? (Where's my calculator?)
Sorry for the sarcasm, but this is NOT a "Help me! Is there a formula?"
situation. It just takes some Thinking.
Post a Followup