[問題] GWD 10-19

[cimim]

Q19:
A total of $60,000 was invested for one year. But of this amount earned simple annual
interest at the rate of x percent per year, and the rest earned simple annual interest at the
rate of y percent per year. If the total interest earned by the $60,000 for that year was
$4,080, what is the value of x?

(1) x = (3/4) y

(2) The ratio of the amount that earned interest at the rate of x percent per year to
the amount that earned interest at the rate of y percent per year was 3 to 2.

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.

答案C 麻煩高手幫忙講解一下

But of this amount earned... , and the rest earned
哪來的兩個amount ?? 不懂

[yuying]

Q19:
A total of $60,000 was invested for one year. But of this amount earned simple annual
interest at the rate of x percent per year, and the rest earned simple annual interest at the
rate of y percent per year. If the total interest earned by the $60,000 for that year was
$4,080, what is the value of x?

(1) x = (3/4) y

(2) The ratio of the amount that earned interest at the rate of x percent per year to
the amount that earned interest at the rate of y percent per year was 3 to 2.

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.

答案C 麻煩高手幫忙講解一下

But of this amount earned... , and the rest earned
哪來的兩個amount ?? 不懂

應該是typo, 原稿上寫的是Some of this amount earned, 不是But of..
這樣這題就是二元一次方程式列式的問題囉
A * X % + (60,000-A) * Y% = 4,080
因次, 需要兩個條件, 才能成立~

[cimim]

請問一下所謂的原稿是??

我手上的題目是在資料庫裡面download回來的

跟所謂的原稿有不一樣嗎 ?

[yuying]

請問一下所謂的原稿是??

我手上的題目是在資料庫裡面download回來的

跟所謂的原稿有不一樣嗎 ?

題目是一樣的, 目前使用word檔是熱心大陸同學type成word檔
原稿指的是原先730原題(機考介面)

[cimim]

請問一下所謂的原稿是??

我手上的題目是在資料庫裡面download回來的

跟所謂的原稿有不一樣嗎 ?

題目是一樣的, 目前使用word檔是熱心大陸同學type成word檔
原稿指的是原先730原題(機考介面)

thx~~