Friday
September 19, 2014

Homework Help: math

Posted by joe on Saturday, April 17, 2010 at 5:00pm.

How do you do this question?
A shipment of 25 television sets contains three defective units. In how many ways can a vending company purchase four of these units and receive (a) all good units, (b) two good units, and (c) at least two good units.

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