GWD MATH 2-10

[MM]

On a certain date, Hannah invested $5,000 at x percent simple annual interest and a different amount at y percent simple annual interest. What amount did Hannah invest at y percent simple annual interest?
(1) The total amount of interest earned by Hannah’s due investments in one year was $900.
(2) Hannah invested the $5,000 at 6 percent simple annual interest.

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D. EACH statement ALONE is sufficient.
E. Statements (1) and (2) TOGETHER are NOT sufficient.

請教一下 可以有人告訴我為何答案不是c嗎?

[fiona]

答案是E嘛~
因為不確定投資於Y%的金額
不知道利率 不知道投資金額
只知道利息 組合會有不只一種