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Quantitative Aptitude

Averages

Last year, De...

Question

Last year, Department Store X had a sales total for December that was 4 times the average (arithmetic mean) of the monthly sales totals for January through November. The sales total for December was what fraction of the sales total for the year?

A

¼

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B

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C

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D

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Solution

The correct option is B
Let, average sales from January through November = a;
December Sales = 4a;
Total Sales = 11a + 4a = 15a;
Fraction = $\frac{4}{15}$

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