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Bunuel
A grocery store sells boxes of two kinds of cereals, wheat-based and rice-based. In this store, the average weight of a box of rice-based cereal is 60 ounces, the average weight of a box of wheat-based cereal is 48 ounces, and the average weight of all the boxes of cereal is 50 ounces. What is the ratio in this store of boxes of rice-based cereals to wheat-based cereals?

A. \(\frac{1}{12}\)

B. \(\frac{1}{6}\)

C. \(\frac{1}{5}\)

D. \(\frac{1}{4}\)

E. \(\frac{1}{3}\)
Overall avg = 50 oz
Avg. wt of rice cereal = 60 oz => this is 10 higher than the overall avg
Avg. wt of wheat cereal = 48 oz => this is 2 lower than the overall avg
Thus, to ensure the sum of deviations is zero, we need 1 unit of rice cereal and 5 units of wheat cereal, forming 6 units of total

=> rice : wheat = 1 : 5
Ans C
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