Please help with these its urgent need to finish these homework and need to know how to do them correctly for upcoming exam
1. Let X represent the number that occurs when a green die is tossed and Y the number that occurs when a red die is tossed. What is the variance of the random variable X-2Y?
Choose from the following of right answer:
A. 35/12
B. 35/6
C. 7
D. 175/12
2.) If a random variable X is defined such that E(X-1)2=11 and E(X-2)2=10, then the variance of X is
3.) Consider the density function f(X)=5k/4 X1/4,0