1. Xuan sold 9 used book for $9.80 each. With the money from these sales, she bought 4 new books and had $37.8 left over. What was the average amount Xuan paid for each new book ?

Answer and Explanation

Your Answer is

Correct Answer is D

Explanation

There is $37.8 left, so the cost of four books is 9.8×9-37.8, so the average price per book is 12.6, choose D