prep 模考数学题一道，等待NN们解答

bisujiangkai

1. Bobby bought two shares of stock, which sold for $96 each. If he had a profit of 20 percent on the sale of one of the shares but a loss of 20 percent on the sale of the other share, then on the sale of both shares Bobby had a loss of how much shares?

答案： a loss of & 8

怎么算呢？

bisujiangkai

哦，刚才打错了，答案是：a loss of $ 8.

verylotus

96/1.2=80,涨了的原价是80     96/0.8=120跌了的原价120    120-96-（96-80）=8  损失8刀

xiao_s000

Bobby bought two shares of stock? 应该是sold吧？

bisujiangkai

正确！BOBBY先买了，然后再卖出去。楼上的解答是对的！谢谢！

xiao_s000

Bobby bought two shares of stock, which sold for $96 each.可不可以理解为买的时候是96呢？

bisujiangkai

还可以这么做，96/1.2=80, 涨了的原价是80     96/0.8=120跌了的原价120 ，
所以 200+80-96*2= 8
所以损失是 $8。 感谢楼上的verylotus!

verylotus

题目中说了sold for $96 each，就应该是卖了96吧，再说要是都是96买的，那这个题目赚的和亏得就一样多，基数也一样，就等于总和没有任何变化，这个问题就没有意义了

xiao_s000

所以我推断是题的表述上有问题，which 做share的定语，而这个定语是在Bobby bought two shares of stock，之后，很容易理解为（或者说就应该理解为）和Bobby bought two shares of stock是一句话。就是说：bobby买了两种卖价为96刀的股票。如果改为Bobby sold two shares of stock，which sold for $96 each。然后再接后面的话就没有歧义。请指正！！！！

verylotus

没想到楼上是这么想的，貌似也有道理，语法做多了的症状