This GMAT quant practice question is a problem solving question from Averages. Concept: Computing arithmetic mean or averages of a subset of a set of numbers.

#### Question: The average of 5 quantities is 6. The average of 3 of them is 8. What is the average of the remaining two numbers?

- 4
- 5
- 3
- 3.5
- 0.5

#### Video Explanation

Scroll down for explanation text#### Explanatory Answer

Video explanation provided for this questionThe average of 5 quantities is 6.

Therefore, the sum of the 5 quantities is 5 * 6 = 30.

The average of three of these 5 quantities is 8.

Therefore, the sum of these three quantities = 3 * 8 = 24

The sum of the remaining two quantities = (Sum of all 5 - Sum of 3 quantities) = 30 - 24 = 6.

Average of these two quantities = \\frac{6}{2}\\) = 3

Choice C is the correct answer.

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