MathRevolution wrote:

[GMAT math practice question]

At a fruit store, apples are sold for $4 per pound and oranges are sold for $6 per pound. Is the total weight of apples sold greater than the total weight of oranges sold?

1) The average (arithmetic mean) price of fruit sold is less than $5.

2) The total weight of fruit sold is 10 pounds.

Statement 1:

The average price-per-pound for the MIXTURE of apples and oranges (less than $5) is closer to the price-per-pound for apples ($4) than to the price-per-pound for oranges ($6).

Implication:

Weight-wise, the mixture must be composed mostly of apples.

Thus, the answer to the question stem is YES.

SUFFICIENT.

Statement 2:

If the mixture is composed of 9 pounds of apples and 1 pound of oranges, the answer to the question stem is YES.

If the mixture is composed of 1 pound of apples and 9 pounds of oranges, the answer to the question stem is NO.

Since the answer is YES in the first case but NO in the second case, INSUFFICIENT.

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