Question

Define GM and HM of no.a and b

Answer 1

2. GM means Geometric Mean

The geometric mean is an average that is useful for sets of positive numbers that are interpreted according to their product and not their sum (as is the case with the arithmetic mean) e.g. rates of growth.

For example, the GM of two numbers, say a and b is

sqrt (ab)

3. HM means Harmonic Mean

The harmonic mean is an average which is useful for sets of numbers which are defined in relation to some unit, for example speed (distance per unit of time).


For example, the HM of two numbers, say a and b is

2 / (1/a + 1/b)

The relation between them is HM <=GM<=AM