4. Suppose we have random variables W and Q, and we know Var(W) = 25, Var(Q) = 10, and Cov(W, Q) = 2. Now, let A = 2W + 4Q. What is Var(A)?

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A: As per bartleby guidelines we can solve only first question and rest can be reposted

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Q: 1 The discrete random variable X has Var (X) = 5 Find Var (4X – 3)

A: Given, V(X)=5

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Q: 3. Let the random variable X have the pmf f(x) = = a) E(X) b) E(X²) c) E(3X²2X + 4) (x+1)² for x =…

A: The provided information is as follows:The probability mass function of  is .

Q: A bag contains 7 coins, 2 of which have a head on both sides while the other 5 coins are normal. A…

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Q: Let x1  and x1 be independent standard normal random variables. If Y1= x1 + 2x2 and  Y2 = 2x1 - x2,…

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Q: Suppose that X and Y are independent random variables with EX=EY=100, and E[min(X,Y)}=79. Find…

A:

Q: Let P and Q be two independent Random variables with Var(P) = 5 and Var(Q) = 4. Find Var(7P+4Q-1).

A:

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