Statistics And Probability Question 582

Question: The harmonic mean of 4, 8, 16 is

[AMU 1995]

Options:

A) 6.4

B) 6.7

C) 6.85

D) 7.8

Show Answer

Answer:

Correct Answer: C

Solution:

H.M. of 4, 8, 16 $ =\frac{3}{\frac{1}{4}+\frac{1}{8}+\frac{1}{16}}=\frac{48}{7}=6.85 $ .