An electronics store receives a shipment of 20 graphing calculators, including 7 that are defective. Four of the calculators are selected to be sent to a local high school.
A) How many selection can be made using the original shipment?
B) How many of these selections will contain no defective calculators?
Solution:-
A) How many selection can be made using the original shipment?
4845
B) How many of these selections will contain no defective calculators?
715