Asked by Oshurbekova

An electronic store receives a shipment of 30 graphing calculators, including 6 that are defective. Four of these calculators are selected to be sent to a local high school. How many selections can be made? How many of this selections will contain two defective calculators?
Answered by YOY
a) 30C4=27405

b) 6C2x24C2=4140
Answered by Anonymous
30 C 4
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