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If the Harmonic Mean of 2, a, 8 be 24/7, the value of a is 17

Question:

If the Harmonic Mean of 2, a, 8 be 24/7, the value of a is 17

A.

4

B.

6

C.

12

D.

9

Answer» a. 4

Note: The above multiple-choice question is for all general and Competitive Exams in India