模考数学题没弄懂一道，求助大神！

neowangkkk · 发表于 2012-12-5 22:34:29

求助帖：在mba官网模拟测试一里面，做了没看懂的一道题，求高手大神指点！

Stock       Number of share
V           68
W           112
X           56
Y           94
Z           45

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?

1) 4
2) 6
3) 9
4) 25
5) 20

neowangkkk · 发表于 2012-12-5 22:53:33

答案D没错。原来我没弄懂range的意思，准备时间太短了惭愧啊。多谢Annapp和baloke1019热心相助！！

baloke1019 · 发表于 2012-12-5 22:48:52

Stock Number of shares Before and After transaction
V - 68 - 68
W - 112 - 112
X - 56 - 36
Y - 94 - 118
Z - 45 - 45
Previous range - 67 (112-45)
Range after transaction - 82 (118-36)
Increase = 82 - 67 = 15 D

Annapp · 发表于 2012-12-5 22:44:46

这道题解析答案是多少啊？
我理解的是求极差的变化
算出来时15.。。。

模考数学题没弄懂一道，求助大神！

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