Alice's take-home pay last year was the same each month, and she saved the same fraction of her take-home pay each month.The total amount of money that she had saved at the end of the year was 3 times the amount of that portion of her monthly take-home pay that she did not save.If all the money that she saved last year was from her take-home pay, what fraction of her take-home pay did she save each month?
(A) 1/2
(B) 1/3
(C) 1/4
(D) 1/5
(E) 1/6
麻烦大家帮忙解答一下~
作者: gifiler 时间: 2009-9-30 20:14
设每月收入为M 存钱比例为S
则有12*M*S=3*M*（1-S）
整理一下 就可以算出S=1/5
作者: ferferzor 时间: 2009-10-1 08:42
哈哈，明白了，太感谢了~
欢迎光临 国际顶尖MBA申请交流平台--TOPWAY MBA (http://forum.topway.org/)
