In a store, the total price for 25 shirts is $400 and the total price for 75 sweaters is $1500. By how much does the average (arithmetic mean) price of a sweater exceed that of a shirt in this store?	Choices:  A) $ 1  B) $ 2  C) $ 3  D) $ 4  E) $ 5

Rationale: the average price of a shirt is : $ 400 / 25 = $ 16 . the average price of a sweater is : $ 1500 / 75 = $ 20 . the difference in price is : $ 20 - $ 16 = $ 4 . the answer is d .
Answer: D