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02 Jun 2010, 22:01
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D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
35%
(medium)
Question Stats:
76% (02:04) correct
24%
(02:00)
wrong
based on 188
sessions
History
Date
Time
Result
Not Attempted Yet
At a certain convenience store, the revenue from Brand A hot dogs decreased by 5% from April to May, while the revenue from Brand B hot dogs increased by 5% from April to May. The revenue from Brand A in May was what percentage of the revenue from Brand B in April?
(1) The increase in revenue from Brand B was 19/20 the decrease in revenue from Brand A.
(2) The revenue in April from Brand A was equal to 20/19 the revenue in April from Brand B.
(1) The increase in revenue from Brand B was 19/20 the decrease in revenue from Brand A.
(2) The revenue in April from Brand A was equal to 20/19 the revenue in April from Brand B.
07 Jun 2010, 12:38
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shekar123
Given:
Attachment:
untitled.JPG [ 4.73 KiB | Viewed 5407 times ]
Q: \(\frac{0.95A}{B}=\frac{19A}{20B}=?\)
(1) The increase in revenue from Brand B was 19/20 the decrease in revenue from Brand A --> \(0.05B=\frac{19}{20}0.05A\) --> \(\frac{A}{B}=\frac{20}{19}\) --> hence \(\frac{19A}{20B}=1\). Sufficient.
(2) The revenue in April from Brand A was equal to 20/19 the revenue in April from Brand B --> \(A=\frac{20}{19}B\) --> hence \(\frac{19A}{20B}=1\). Sufficient.
Answer: D.
Hope it's clear.
General Discussion
07 Jun 2010, 11:41
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The OA is correct A. Since this does not seem more of math question I will try to use as much english as possible to explain DS. I also think the idea of this question is to make people enjoy scary maths over any other approach.
Q Says revenue from Brand A & Brand B share a percent decrease & increase during the accounting month of from April to May the statement underlined is very important. I will explain later why.
Now Question that need to be answered can we find the percentage revenue if statement 1 is given. YES. I do not want to focus on maths here however since all required information is presented we can caculate the revenue percentage (Revenue of Brand A/Revenue of Brand B * 100 ).
Statement 1 - The increase in revenue from Brand B was 19/20 the decrease in revenue from Brand A. Point to be noted here, the key thing about this statement is that it does not talk about the months and derives from the information above to provide revenue information. Hence Sufficient. We can setup the equation and solve.
Statement 2. The revenue in April from Brand A was equal to 20/19 the revenue in April from Brand B.
Choices.
Can I use the information in statement 2 ? NO. Why ? because it smartly introduces the month April
Now please revisit the question stem in the above bold letters :
Q Says revenue from Brand A & Brand B share a percent decrease & increase during the accounting month of from April to May the statement underlined is very important. I will explain later why.
Here is why :
1. Since the question is not asking us to calculate the revenue percentage itself for the month of April this information is insufficient or irrelevant to answer.
2. Since the revenue are given through the month of April to May we dont have the revenue information for the month of April and we cannot setup up the equations to solve this problem.
Please consider giving kudos if you like the explanation.
Q Says revenue from Brand A & Brand B share a percent decrease & increase during the accounting month of from April to May the statement underlined is very important. I will explain later why.
Now Question that need to be answered can we find the percentage revenue if statement 1 is given. YES. I do not want to focus on maths here however since all required information is presented we can caculate the revenue percentage (Revenue of Brand A/Revenue of Brand B * 100 ).
Statement 1 - The increase in revenue from Brand B was 19/20 the decrease in revenue from Brand A. Point to be noted here, the key thing about this statement is that it does not talk about the months and derives from the information above to provide revenue information. Hence Sufficient. We can setup the equation and solve.
Statement 2. The revenue in April from Brand A was equal to 20/19 the revenue in April from Brand B.
Choices.
Can I use the information in statement 2 ? NO. Why ? because it smartly introduces the month April
Now please revisit the question stem in the above bold letters :
Q Says revenue from Brand A & Brand B share a percent decrease & increase during the accounting month of from April to May the statement underlined is very important. I will explain later why.
Here is why :
1. Since the question is not asking us to calculate the revenue percentage itself for the month of April this information is insufficient or irrelevant to answer.
2. Since the revenue are given through the month of April to May we dont have the revenue information for the month of April and we cannot setup up the equations to solve this problem.
Please consider giving kudos if you like the explanation.
