NDA2011MathematicsSequences and SeriesActual
What is the geometric mean of 10,40 and 20 ?
Options
- A10
- B20
- C40
- D70
Correct answer
B. 20
Step-by-step solution
Geometric mean of 10,40 and 20 is aligned Here n & =3 G.M. & = [3] 10 40 20 = [3] 8000 & = (20^3 )^ 1 3 =20 . aligned