Teaching BPSC बिहार माध्यमिक TGT (9 to 10) शिक्षक भर्ती 4.0 Mock Test Quantitative Aptitude Elementary Statistics
The standard deviation of data x1, x2, x3, …, xn is σ(σ > 0). Then the standard deviation of data 3x1 + 2, 3x2 + 2, 3x3 + 2, …, 3xn + 2 is
1
3σ
2
σ
3
3σ + 2
4
More than one of the above
5
None of the above