Homework Help: math

Posted by Kristin on Wednesday, February 2, 2011 at 6:03pm.

An urn holds 13 identical balls except that 2 are white, 4 are black, and 7 are red. An experiment consists of selecting two balls in succession without replacement and observing the color of each of the balls.
How many outcomes are in the sample space for this experiment?

How many outcomes are in the event "no ball is white?"

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