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The numbers 10, 51.2 and 8 multiply together to give 4,096. What is their geometric mean?
AIt is 23.07
BIt is 16.00
CIt is 12.80
DIt is 20.48
Answer & Solution
Correct answer: B. It is 16.00
1. The geometric mean of three numbers is the cube root of their product.
2. The product here is 4,096.
3. The cube root of 4,096 is 16, since 16 times 16 times 16 returns 4,096.
4. A value of 23.07 is the arithmetic mean of the three numbers, which is a different average altogether.
_Source: OpenStax Introductory Business Statistics (CC BY 4.0), Ch 2 "Descriptive Statistics", section 2.5 Geometric Mean_
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