Teaching BPSC बिहार मध्य विद्यालय (6 to 8) शिक्षक भर्ती 4.0 Mock Test Mathematics Statistics Variance and Standard Deviation
Coefficient of variations of two distributions are 55 and 65 and their standard deviations are 22 and 39 respectively. Their arithmetic means are respectively.
1
15, 20
2
40, 60
3
30, 50
4
More than one of the above.
5
None of the above