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March 28, 2015

March 28, 2015

Posted by **clay** on Saturday, February 12, 2011 at 6:37am.

- math -
**Reiny**, Saturday, February 12, 2011 at 9:05amTo handle this type of question, my must be familiar with the C(n,r) notation.

The person can select the books in C(10,4) or 210 ways

the CD's in C(20,2) or 190 ways

and the DVD's in C(5,1) or 5 ways.

So the number of ways to make the selection is

210*190*5 ways or 199500 ways.

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