请教NN一道数学难题

newjoshkao

请教NN一道数学

 

IN a group of students, each student either has three oranges and one apple or has one orange and two apples. If the average number of apples each student has is 1.6, what is the average number of oranges each student has?
                

 

(A)1.2  (B)1.5  (C)1.7  (D)1.9  (E)2.3

 

答案是给C, 但我怎么算，都是得到1.8，

不知是自己算错了，还是答案给错了？

 

 

windygirl

1.8

你的答案好像有问题，我的题目里是1.8

[此贴子已经被作者于2008-11-21 12:01:45编辑过]