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What is the mean proportional between 3 and 27?

A30

B81

C15

D9

Answer:

D. 9

Read Explanation:

Solution: Given: 3 and 27 Concept used: Mean Proportion = √(a × b) Calculation: Mean Proportion = √(3 × 27) Mean Proportion = √(81) = 9 ∴ The mean proportion of 3 and 27 is 9.

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