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 How many of these selections will contain no defective calculators ?

Organic apples are on special for $1.50 per pound. does total cost vary inversely or directly with the number of pounds purchased? find the cost of 3.4 pounds of apples. a. inversely: $5.10 b. directly; $5.10 c. inversely: $2.27 d. directly; $2.27