A random variable X has $$\overline {\text{X}} $$ = 0 & $$\sigma _{\text{x}}^2$$ = 1. Form a new random variable Y = 2X + 1. The values of $$\overline {\text{Y}} $$ & $$\sigma _{\text{y}}^2$$ are:
A. 0 & 1
B. 1 & 2
C. 1 & 4
D. None of these
Answer: Option C
Related Questions on Communication Systems
It is found that a ship to ship communication suffers from fading. This can be avoided by using
A. Space diversity
B. Frequency diversity
C. Broad band antenna
D. Directional antenna
A. A double-tuned amplifier
B. A high gain D.C. amplifier
C. A cathode follower stage
D. None of the above
A. Filter method
B. Phase cancellation method
C. Good attenuation characteristics
D. All of the above

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