February 20, 2017

Homework Help: math

Posted by Zoe on Saturday, February 21, 2009 at 9:08pm.

Three coins are selected from 10 coins: 4 dimes, 4 nickels, and 2 quarters.

In how many possible ways can the selection be made so that the value of the coins is at least 25 cents?

I know that the total outcomes equals 120, but how do I find how many of these have the value of at least 25 cents?

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