※ 引述《qqopqqop (p )》之铭言： : A certain company that sells only cars and trucks reported that : revenues from car sales in 1997 were down 11 percent from 1996 and revenues : from truck sales in 1997 were up 7 percent from 1996. If total revenues : from car sales and truck sales in 1997 were up 1 percent from 1996, what is : the ratio of revenue from car sales in 1996 to revenue from truck sales in : 1996? : ans 1:2 : 怎麽算怎麽不对 有人可以帮我一下吗><? SALES(数量) 1996 1997 cars x 0.89x truck y 1.07y REVENUE(数量*单价) 0.89xc+1.07yt=1.01(xc+yt) ----> 0.06yt=0.12xc 所以 xc/yt=1:2 -- No doubt, just keep walking --

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