Question

Q2: For a G.P if S = 16, S. 144 then r=?
a) 2 b)-2
c)
d) -1/2​

Answer 1

Answer:

Given :

The harmonic mean and the geometric mean of two numbers are 10 and 12 respectively

Concept used :

(Geometric mean)2 = Harmonic mean × Arithmetic mean

Calculations :

according to the formula given above

(12)2 = 10 × Arithmetic mean

⇒ Arithmetic mean = 144/10

⇒ 14.4