Question 21 (Textile Engineering & Fibre Science)
If X and Y are two independent random variables, then Variance (X-Y) is
(A) | Variance (X) + Variance (Y) |
(B) | Variance (X) – Variance (Y) |
(C) | Variance (Y) – Variance (X) |
(D) | Variance (XY) |
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