The arithmetic mean and geometric mean of two numbers

• Quant Statistics

The arithmetic mean and geometric mean of two numbers are 14 and 12 respectively. What is the harmonic mean of the numbers?

1. 32/3
2. 10
3. 72/7
4. 13

Solution

G² = AH

H = G²/A

H = 12*12/14 = 72/7

The correct option is C.