defence exam Agniveer Vayu Group X & XY Mock Test 01/2026 Mathematics Statistics Variance and Standard Deviation
Let the median and the mean deviation about the median of 7 observation 170, 125, 230, 190, 210, a, b be 170 and \(\rm \frac{205}{7}\) respectively. Then the mean deviation about the mean of these 7 observations is :
1
31
2
28
3
30
4
32