ＰＲＥＰ

miafy

4.  765-!-item-!-187;#058&000550

In a stack of boards at a lumber yard, the 20th board counting from the top of the stack is immediately below the 16th board counting from the bottom of the stack.  How many boards are in the stack?

 

(A) 38

(B) 36

(C) 35

(D) 34

(E) 32

能不能帮忙翻译一下

jetking

一个柜子从上面数某一个抽屉是第二十层，从下面数是第16层，问总共有多少层？

miafy

那怎么做啊