math破解 问一道题

650wansui

182.19831-!-item-!-187;#058&012571

The table shows the number of shares of each of the 5 stocks owned by Mr. Sami.If Mr. Sami was to sell 20 shares of Stock X and buy 24 shares of Stock Y, what would be the increase in the range of the numbers of shares of the 5 stocks owned by Mr. Sami?



(A) 4

(B) 6

(C) 9

(D) 15

(E) 20


问一下为什么选D  我觉得选A 应该


table里面对应的   V　W X Y Z 分别是 68 112 56 94 和 45

快乐小龙

问得是range增加了多少
原来的range 是112-45=67
新的range是118-36=82

所以增加的range是82-67=15

650wansui

非常感谢