The correct answer is D

Explanation

The average price of the pens is equal to the total price of all of the pens divided by the total number of pens. There are??pens priced at??dollars each, so the total price of these pens is??dollars. There are??pens priced at??dollars each, so the total price of these pens is??dollars. Thus the total price of all of the pens is?dollars, and the total number of pens is?, the average price, in dollars, of all of these pens is?.