A bag contains 13 balls numbered 1 through 13.What are the odds in favor of selecting a ball that has an even number?

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- Nov 12th 2009, 09:15 PMbball20Finding the odds
A bag contains 13 balls numbered 1 through 13.

**What are the odds in favor of selecting a ball that has an even number?** - Nov 12th 2009, 09:42 PMmr fantastic
- Nov 12th 2009, 09:42 PMTwig
Hi

Even numbers: 2,4,6,8,10,12

Odd numbers: 1,3,5,7,9,11,13

There are 6 even numbers and 7 odd numbers.

So the odds are:

even : odd -> 6:7

Or $\displaystyle P(\mbox{ Ball with even number }) = \frac{6}{6+7}$