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Good Question!!!!

by rakeshd347 » Thu Oct 03, 2013 9:57 pm
Before being simplified, the instructions for computing income tax in Country Rwere to add 2 percent of one's annual income to the average(arithmetic mean)of 100units of Country R's currency and 1 percent of one's annual income. Which of the following represents the simplified formula for computing the income tax in Country R's currency, for a person in that country whose annual income is I?
(A) 50+I/200
(B) 50+3I/100
(C) 50+I/40
(D) 100+I/50
(E) 100+3I/100

OA C
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by theCodeToGMAT » Thu Oct 03, 2013 10:08 pm
Answer [spoiler]{C}[/spoiler]


Tax = 2(I)/100 + [ (100 + I/100)/2]
= 2I/100 + 50 + I/200
= I/40 + 50
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by [email protected] » Thu Oct 03, 2013 11:08 pm
Hi rakeshd347,

In certain Quant questions, you might find it easier to "convert" data from one format to another. While the answers are in "fraction format", you can very easily do the work with decimals, if you find that format easier.

Here we'd need to translate the given question into decimals:

J = one's income (I'm using "J" because an I looks like a 1)

2% of one's income = .02(J)

Avg of 100 units and 1% of one's income = (100 + .01(J)) / 2

Tax = .02(J) + 50 + .005(J)
Tax = .025(J) + 50
Tax = J(1/40) + 50

Final Answer: C

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by GMATGuruNY » Fri Oct 04, 2013 12:37 am
rakeshd347 wrote:Before being simplified, the instructions for computing income tax in Country Rwere to add 2 percent of one's annual income to the average(arithmetic mean)of 100units of Country R's currency and 1 percent of one's annual income. Which of the following represents the simplified formula for computing the income tax in Country R's currency, for a person in that country whose annual income is I?
(A) 50+I/200
(B) 50+3I/100
(C) 50+I/40
(D) 100+I/50
(E) 100+3I/100

OA C
Let I = 200 units of currency.
The tax is the SUM of two values: 2% of the income AND the average of 100 units of currency and 1% of the income.
2% of the income = .02(200) = 4.
The average of 100 units of currency and 1% of the income = (100 + .01(200)) / 2 = 102/2 = 51.
Tax = 4+51 = 55. This is our target.

Now we plug I=200 into the answers to see which yield our target of 55.

Only answer choice C works:
50 + I/40 = 50 + 200/40 = 55.

The correct answer is C.
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by ganeshrkamath » Sun Oct 06, 2013 12:04 am
rakeshd347 wrote:Before being simplified, the instructions for computing income tax in Country Rwere to add 2 percent of one's annual income to the average(arithmetic mean)of 100units of Country R's currency and 1 percent of one's annual income. Which of the following represents the simplified formula for computing the income tax in Country R's currency, for a person in that country whose annual income is I?
(A) 50+I/200
(B) 50+3I/100
(C) 50+I/40
(D) 100+I/50
(E) 100+3I/100

OA C
Income tax = 0.02I + (100+0.01I)/2
= 0.025I + 50
= 50 + I/40

Choose C

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