Question

Find the harmonic mean of the values $2,4,8,12$. Round off your answer to the nearest whole number.

• A. $1$
• B. $2$
• C. $3$
• D. $4$

Answer 1

The correct option is D $4$

Harmonic mean $=\frac{n}{\sum _{i=1}^n\frac{1}{x_i}}$

HM $=\frac{4}{\frac{12+6+3+2}{24}}=\frac{4\times 24}{23}=4.17=4$