engineering recuitment GATE ECE 2023-24 Test Series Communication Systems Random Processes

The statistically independent random variables ‘X’ and ‘Y’ have mean value Ux = 2 and Uy = 4. They have second order moments E[X2] = 8 and E[Y2] = 25. What is E[W2] for the random variable W = 3X – Y?

1
49
2
40
3
145
4
0
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