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In a grocery store, the average sale for month X was A [#permalink]
 22 Mar 2005, 08:13
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In a grocery store, the average sale for month X was A dollars. Was the average sale for month Y at least 20 percent higher than that for month X?
(1) For month X, total revenue from sales was $ 35,000
(2) For month Y, total revenue fro sales was $ 60,000
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Senior Manager
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This looks like C.
Anyone wants to try a variation?
Total revenues in Y = $40,000.
[Everything else remains the same]
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If "the average sale for month X" implies, average daily sales for month X, I would go with (E).
Month X could have any of 31, 30, 28 or 29 days.
Since the avegare daily sales = A, the total sales for Month X could be any of: 31X, 30X, 28X or 29X
Now, month Y could have any of 31, 30, 28 or 29 days in all.
Clearly, statements (1) and (2) are insufficient if treated separately, let us just examine case (C) here:
For month X, total revenue from sales was $ 35,000 - (1)
AND
For month Y, total revenue fro sales was $ 60,000 - (2)
(1) implies, the average daily sales for Month X could be
- $35000/31 or
- $35000/30 or
- $35000/29 or
- $35000/28
(2) average daily sales for Month Y could be
- $60000/31 or
- $60000/30 or
- $60000/29 or
- $60000/28
Hence, both combined, insufficient.
Is my approach fine or am I just being paranoid? 
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EDITED:
"C" ....we don't know what type of month we are talking about but for any combination of avg X/28,X/29,X/30,X/31 ( min avg will be when X/31 and max for X/28) same for Y.....we can calculate that in all cases avg (u can only calcualte min and max avg) of Y is always > than 20% X....so suff....I guess if Y was 40,000 then it will be E, altho I haven't calculated it.
Last edited by banerjeea_98 on 22 Mar 2005, 12:11, edited 1 time in total.
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Director
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hmmm could be E dunno about the number of days..
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Director
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Questions that seem straight would have tough solutions
I would go for E
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'C'
For all combinations (month --> 28,29,30,31) month Y avg is 20% greater than month X avg
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Re: DS- Average sale [#permalink]
29 Mar 2005, 11:25
swath20 wrote: In a grocery store, the average sale for month X was A dollars. Was the average sale for month Y at least 20 percent higher than that for month X?
(1) For month X, total revenue from sales was $ 35,000
(2) For month Y, total revenue fro sales was $ 60,000
I selected E
you need to know the number of transactions for each month to compute the average sale value.
What's the OA?
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I think the ans is C.
If the question stem didn’t ask for “at leastâ€
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Senior Manager
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Dont have the OE but the OA is E
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Explanation for choose E might be because "average sales" is undefined in the question. You guys added the word "daily" to make it clear, but is it the intend of the question?
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ywilfred wrote: maaverick wrote: If "the average sale for month X" implies, average daily sales for month X, I would go with (E). Month X could have any of 31, 30, 28 or 29 days. Since the avegare daily sales = A, the total sales for Month X could be any of: 31X, 30X, 28X or 29X Now, month Y could have any of 31, 30, 28 or 29 days in all. Clearly, statements (1) and (2) are insufficient if treated separately, let us just examine case (C) here: For month X, total revenue from sales was $ 35,000 - (1) AND For month Y, total revenue fro sales was $ 60,000 - (2) (1) implies, the average daily sales for Month X could be - $35000/31 or - $35000/30 or - $35000/29 or - $35000/28 (2) average daily sales for Month Y could be - $60000/31 or - $60000/30 or - $60000/29 or - $60000/28 Hence, both combined, insufficient. Is my approach fine or am I just being paranoid? Good explanation. Good thinking but will this not lead to answer E, for if you calculate them out you'll see the answer is unique and C would be your answer.
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close
