Ms. Jones has twice as much invested in stocks as in bonds. Last year,

Question

Ms. Jones has twice as much invested in stocks as in bonds. Last year, the stock investments paid 7.5 percent of their value and the bonds paid 10 percent of their value. If the total that both investments paid last year was $1,000, how much did Ms. Jones have invested in stocks?

(A) $3,636
(B) $4,000
(C) $7,500
(D) $8,000
(E) $10,000

(A) $3,636
(B) $4,000
(C) $7,500
(D) $8,000
(E) $10,000

Sasindran · Answer

Option A

Let investment in stock be S and bonds be B
So B=2S.
0.075S+0.10B=1000
0.075S+0.20S=1000
Solving S=3636

Posted from my mobile device

igrunner · Answer

x=bonds
2x=stocks
2x(.075)+.1x=1000
=>x=4000 =>2x=8000
hence D

ScottTargetTestPrep · Answer

We can let the amount invested in bonds = n and the amount invested in stocks = 2n. Thus, the interest earned from stocks was 0.075(2n) = 0.15n and the interest earned from bonds was 0.1n.

Since the total interest made from both investments was 1,000, we have:

0.15n + 0.1n = 1,000

0.25n = 1,000

n =1,000/0.25 = 100,000/25 = 4,000

The amount invested in bonds is n = 4,000. The amount invested in stocks is 2n = 8,000.

Answer: D

SharkSha · Answer

Sorry for my poor English here... I have a question of "Ms. Jones has twice as much invested in stocks as in bonds."
Does this mean Stock=2Bond or Bond=2Stock?

I saw the explanation of "Twice as many A as B" clause in somewhere else and it means A=2B, and it seems not match the answer in this question. 
How should I understand this clause?

Ms. Jones has twice as much invested in stocks as in bonds. Last year,

Prep Toolkit

Top 5 GMAT Debrief Videos

615 to 715 in 15 Days (Ria's Strategies)

More than Quant/Verbal Abilities: Speed vs. Accuracy

745 with Only Self-Prep and GMAT Club

From 555 to 765: 210-point Improvement

Perfect 805 Score Debrief by Julia

My Rewards

GMAT Problem Solving (PS) Questions

Ms. Jones has twice as much invested in stocks as in bonds. Last year,

Prep Toolkit

615 to 715 in 15 Days (Ria's Strategies)

More than Quant/Verbal Abilities: Speed vs. Accuracy

745 with Only Self-Prep and GMAT Club

From 555 to 765: 210-point Improvement

Perfect 805 Score Debrief by Julia

My Rewards