defence exam Agniveer Vayu Group X & XY Mock Test 01/2026 Mathematics Statistics Variance and Standard Deviation
Consider the following statements:
1. If y = ax + b, then variance of y is a(variance of x) + b
2. Variance of 4x1, 4x2, ........, 4xn is 16 times the variance of x1, x2, x3, ..........xn
Which of the above statement(s) is/are correct?
1
Only 1
2
Only 2
3
Both 1 and 2
4
Neither 1 nor 2