问prep-2-140觉得答案有问题

rachelchen52

140.
                

 

A manufacturer produced x percent more video cameras in 1994 than in 1993 and y percent more video cameras in 1995 than in 1994.  If the manufacturer produced 1,000 video cameras in 1993, how many video cameras did the manufacturer produce in 1995 ?

(1)XY=20

(2)X+Y+XY/100=9.2

 

答案是B,(2)单独就可以，

但是为什么呢？这里也没说X,Y是整数啊。。。

 

哪位NN可以帮忙看一下？谢谢！！！

jasonsong

这道题很简单啊，1995年产量=（1+x%)(1+y%)1000=(1+x%+y%+xy/10000)1000

把两个条件引进去，就=1000（1+20/10000+9/100)=1092