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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
(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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22 Mar 2005, 09:51
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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?
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?
