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Bunuel
Last year Bakery A had a total sale of cookies in December that was 4 times the average (arithmetic mean) of the monthly cookie sales totals for January through November. The cookie sales total for December was what fraction of the total cookie sales for the year?

A. 1/4
B. 4/15
C. 1/3
D. 4/11
E. 4/5
Let the average sale of cookies for the month of January through November be 1

So, Total Sale of cookies for the month of January through November is 11

Sale in December is 4

Quote:
The cookie sales total for December was what fraction of the total cookie sales for the year?

Sale of December is \(\frac{4}{11 + 4}\) = \(\frac{4}{15}\) of the total cookie sales for the year, answer will be (B)
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