OG12th PS 115

meckychen

Mary's income is 60 percent more than Tim's income, and Tim's income is 40 percent less than Juan's income. What percent of Jane's income is Mary's income?

A 124%

B 120%

C 96%

D 80%

E 64%

The answer is C

My answer as follow:

If Tim's income is X

so Mary's is 1.6X while Jane's is 1.4X But I can not find the answer, where I am wrong?

Thank you.

whitezt

我的答案同LZ您呢！请教哪位大牛解释一下。多谢！

esoooe

M=1.6T, T=0.6J
SO M=0.96J

abaobao

好像答案错了。 问题问的是 What percent of Jane's income is Mary's income?

og 的答案给的是 Mary’s income is 96 percent of Juan’s income.

我认为应该是(T/0.6)/1.6T

abaobao

好像答案错了。 问题问的是 What percent of Jane's income is Mary's income?

og 的答案给的是 Mary’s income is 96 percent of Juan’s income.

我认为应该是(T/0.6)/1.6T

-- by 会员 abaobao (2011/1/15 10:33:04)

又看了一遍解释， 是我理解错了， og 对的。

jiaosisisisi

T 's income is 40%less than J's income doesn't equal the expression that
J's income is 40% more than T's income.
That‘s it！
gud lak！

jiaosisisisi

My assumption is that T’s income has yet been confirmed in this question by Mary's income.