Question

The geometric mean of three numbers $3,5,7$ is

• A. $4.717$
• B. $3.717$
• C. $2.717$
• D. $1.717$

Answer 1

The correct option is A $4.717$

The geometric mean of three numbers $a,b,c$ is $\sqrt[3]{3abc}$.

Here $a=3,b=5,c=7$

$\text{GM}=\sqrt[3]{33\times 5\times 7}=\sqrt[3]{3105}$

$\text{GM}=4.717$