问题
单项选择题
A total of 40 brand X television sets and 80 brand Y television sets were purchased for a motel chain. If the price of each brand Y set was twice the price of each brand X set, what percent of the total bill was the price of a brand Y set ？（）
A．0.25%
B．0.5%
C．0.625%
D．0.833%
E．1.0%
答案
参考答案：E
解析：
考生一定要注意的是题目最后问的是一个Y牌电视的价格，设X牌电视的单台价格为x，则Y牌电视的单台价格为2x，所有这些电视的总价格为40x+80×2x=200x，根据题意可得单台Y牌电视占总帐单的百分比为1.0%。