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.
但是我怎么觉得光第二的条件算不出来呢?
式子应该是:1000(1+x) (1+y)=1000(1+xy+x+y)
请大家帮我看看吧,是不是我脑子锈住了??
谢谢!!
式子应该是:1000(1+X/100)*(1+Y/100)
LZ错把X理解成最终的百分比了。
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