What is the harmonic mean of 2 and 6?
Correct answer: B. 3
- A. 2.5
- B. 3
- C. 4
- D. 4.5
Explanation
For two values, the harmonic mean is 2ab/(a + b). Thus, it is 2(2)(6)/(2 + 6) = 24/8 = 3.
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