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#1 2008-07-01 08:12:28
- aube0008
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- Registered: 2008-07-01
- Posts: 4
Probability Word Problem
I already know the answer to this problem, but I need to know the formula that should be used to solve it, and problems like it, correctly.
Here's the problem:
In his pocket, a boy has 3 red marbles, 4 blue marbles, and 4 green marbles. How many will he have to take out of his pocket to ensure that he has taken out at least one of each color?
The answer is 9, I pretty much understand why the answer is 9 logically, but is their a mathematical formula that can be used to solve problems like this?
Thanks!
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#2 2008-07-01 08:24:49
- JaneFairfax
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- Registered: 2007-02-23
- Posts: 6,868
Re: Probability Word Problem
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