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"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, 11:11, edited 1 time in total.

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?
_________________

Keep on asking, and it will be given you;
keep on seeking, and you will find;
keep on knocking, and it will be opened to you.

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.
_________________

Keep on asking, and it will be given you;
keep on seeking, and you will find;
keep on knocking, and it will be opened to you.