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Rebecca's annual income is $15,000 and Jimmy's annual income [#permalink]

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11 Nov 2012, 01:38

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62% (03:07) correct
38% (01:41) wrong based on 150 sessions

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Rebecca's annual income is $15,000 and Jimmy's annual income is $18,000. By how much must Rebecca's annual income increase so that it constitutes 55% of Rebecca and Jimmy's combined income?

Re: Rebecca's annual income is $15,000 [#permalink]

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11 Nov 2012, 01:58

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Pansi wrote:

Rebecca's annual income is $15,000 and Jimmy's annual income is $18,000. By how much must Rebecca's annual income increase so that it constitutes 55% of Rebecca and Jimmy's combined income? (A) $3,000 (B) $4,000 (C) $7,000 (D) $11,000 (E) $25,000

Re: Rebecca's annual income is $15,000 [#permalink]

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15 Nov 2012, 23:09

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chibimoon wrote:

th03 wrote:

Pansi wrote:

Rebecca's annual income is $15,000 and Jimmy's annual income is $18,000. By how much must Rebecca's annual income increase so that it constitutes 55% of Rebecca and Jimmy's combined income? (A) $3,000 (B) $4,000 (C) $7,000 (D) $11,000 (E) $25,000

\(\frac{(15000+x)}{(15000+x+18000)}=0.55\)

Solve for x. You get \(x=7000\)

Why is that that Rebeca + jimmy's combined income is 15000 + X + 18000, shouldnt it be just 15k = 18k?

Rebecca's existing income is $15,000. Let Rebecca's new income be $(15,000+x).

This new income of $(15,000+x) constitues 55% of Rebecca and Jimmy's combined income.

Therefore Rebecca + Jimmy's income = Rebecca's new income + Jimmy's income = $(15,000+x) + $18,000

Rebecca's annual income is $15,000 and Jimmy's annual income is $18,000. By how much must Rebecca's annual income increase so that it constitutes 55% of Rebecca and Jimmy's combined income?

In my opinion, the question is a bit misleading. The answer assumes the reader is combining Rebecca's new income with Jimmy's current income. The way I read the question is Rebecca's current income + Jimmy's current income (which leads to an answer of $3,150).

Where is this from? From my perspective, this doesn't seem like a good question as there is ambiguity, although I may be missing something obvious.

Actually, there is no ambiguity in this question. It is extremely logical that the total salary will consist of Rebecca's new salary.

If Rebecca's new salary has to constitute 55% of their combined income, then obviously, their combined income includes her "new salary" only - there are no two ways about it.
_________________

Re: Rebecca's annual income is $15,000 [#permalink]

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15 Nov 2012, 15:15

th03 wrote:

Pansi wrote:

Rebecca's annual income is $15,000 and Jimmy's annual income is $18,000. By how much must Rebecca's annual income increase so that it constitutes 55% of Rebecca and Jimmy's combined income? (A) $3,000 (B) $4,000 (C) $7,000 (D) $11,000 (E) $25,000

\(\frac{(15000+x)}{(15000+x+18000)}=0.55\)

Solve for x. You get \(x=7000\)

Why is that that Rebeca + jimmy's combined income is 15000 + X + 18000, shouldnt it be just 15k = 18k?

Re: Rebecca's annual income is $15,000 and Jimmy's annual income [#permalink]

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16 Nov 2012, 17:32

Pansi wrote:

Rebecca's annual income is $15,000 and Jimmy's annual income is $18,000. By how much must Rebecca's annual income increase so that it constitutes 55% of Rebecca and Jimmy's combined income?

In my opinion, the question is a bit misleading. The answer assumes the reader is combining Rebecca's new income with Jimmy's current income. The way I read the question is Rebecca's current income + Jimmy's current income (which leads to an answer of $3,150).

Where is this from? From my perspective, this doesn't seem like a good question as there is ambiguity, although I may be missing something obvious.

Re: Rebecca's annual income is $15,000 and Jimmy's annual income [#permalink]

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16 Nov 2012, 22:25

egiles wrote:

Pansi wrote:

Rebecca's annual income is $15,000 and Jimmy's annual income is $18,000. By how much must Rebecca's annual income increase so that it constitutes 55% of Rebecca and Jimmy's combined income?

In my opinion, the question is a bit misleading. The answer assumes the reader is combining Rebecca's new income with Jimmy's current income. The way I read the question is Rebecca's current income + Jimmy's current income (which leads to an answer of $3,150).

Where is this from? From my perspective, this doesn't seem like a good question as there is ambiguity, although I may be missing something obvious.

Yes, i agree, any tips on avoiding this mistake in the future please?

Re: Rebecca's annual income is $15,000 and Jimmy's annual income [#permalink]

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19 Oct 2015, 19:14

Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: Rebecca's annual income is $15,000 and Jimmy's annual income [#permalink]

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25 Nov 2016, 04:48

Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
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Re: Rebecca's annual income is $15,000 and Jimmy's annual income [#permalink]

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30 Nov 2016, 23:15

Quick way to go through options. In order to be 55% of combined salary share of Rebecca, it shoul be higher than salary of Jimmy which is 18,000. so i picked b and c in which I got C as correct ans

Re: Rebecca's annual income is $15,000 and Jimmy's annual income [#permalink]

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02 Dec 2016, 04:34

egiles wrote:

Pansi wrote:

Rebecca's annual income is $15,000 and Jimmy's annual income is $18,000. By how much must Rebecca's annual income increase so that it constitutes 55% of Rebecca and Jimmy's combined income?

In my opinion, the question is a bit misleading. The answer assumes the reader is combining Rebecca's new income with Jimmy's current income. The way I read the question is Rebecca's current income + Jimmy's current income (which leads to an answer of $3,150).

Where is this from? From my perspective, this doesn't seem like a good question as there is ambiguity, although I may be missing something obvious.

Agreed. I made the same mistake.

gmatclubot

Re: Rebecca's annual income is $15,000 and Jimmy's annual income
[#permalink]
02 Dec 2016, 04:34

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