Civil Services UPSC EPFO (EO/AO) Mock Test 2023 Quantitative Aptitude Progression Arithmetic Progression
If the arithmetic mean of a, b, c is \(\rm \frac M 3\) and \(\rm \frac{1}{a} + \frac{1}{b} = -\frac{1}{c} \), then the arithmetic mean of a2, b2, c2 is
1
M2/3
2
3M2
3
6M2
4
9M2