Question

The harmonic mean between $2$ and $4$ is

• A. $\frac{8}{3}$
• B. $\frac{3}{8}$
• C. $\frac{8}{6}$
• D. $\frac{6}{8}$

Answer 1

The correct option is A $\frac{8}{3}$

To find:

Harmonic mean between $2$ and $4=?$

Solution:

H.M.$=\frac{2}{\frac{1}{a_1}+\frac{1}{a_2}}$

Here, $a_1=2,a_2=4$

$\therefore$ H.M.$=\frac{2}{\frac{1}{2}+\frac{1}{4}}$

$=\frac{2\times 4}{3}$

$=\frac{8}{3}$

So, Harmonic mean between $2$ and $4=\frac{8}{3}$