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Engineering Mathematics Miscellaneous

Engineering Mathematics

  1. Let X and Y be two independent random variables. Which one of the relations between expectation (n), variance (Var) and covariance (Cov) given below is FALSE?
    1. E (XY) = E(X) E(Y)
    2. Coy (X, Y) = 0
    3. Var (X+ Y) = Var (X) + Var (Y)
    4. E(X² Y²) = (E (X))² (E (Y))²
Correct Option: D

X and Y are independent
∴ (a), (b), (c) are true
Only (d) is odd one



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