If E(X) = 3, E(Y)= 4, Var(X)=2 and Var(Y)=5, find var(3X+4Y)

(a)  

If E(X) = 3, E(Y)= 4, Var(X)=2 and Var(Y)=5, find E(3X-4Y)

(a)  

If E(X) = 3, E(Y)= 4, Var(X)=2 and Var(Y)=5, Var(3X-4Y)

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If E(X) = 5 find E(3X+5).

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Var(X) = 5 find Var(3X+5)

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A random variable X has a mean of 10 and a standard deviation of 8. An independent random variable Y has a mean of 10 and a standard deviation of 6. What is the mean of X - Y ?

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A random variable X has a mean of 10 and a standard deviation of 8. An independent random variable Y has a mean of 10 and a standard deviation of 6. What is the mean of X - Y ?

(a)  

Let X represent the number on the face that lands up when a biased six-sided number cube is tossed. The expected value of X is 4, and the standard deviation of X is approximately 2.436. Two biased six-sided number cubes will be tossed, and the numbers appearing on the faces that land up will be added. What is the expectation of the sum?

(a)  

Let X represent the number on the face that lands up when a biased six-sided number cube is tossed. The expected value of X is 4, and the standard deviation of X is approximately 2.436. Two biased six-sided number cubes will be tossed, and the numbers appearing on the faces that land up will be added. What is the standard deviation of the sum? give answer to 2 decimal places

(a)  

If X~ B(6,0.2) , find the P (X = 2) . give your answer to 2 decimal places

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If X~ B(6,0.2) , find the P (X < 2) . give your answer to 2 decimal places

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If X~ B(6,0.2) , find the  $P\left(X\le2\right)$  

 give your answer to 2 decimal places.

(a)  

If X~ B(6,0.2) , find the P(X > 2)

give your answer to 2 decimal places.

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If X~ B(6,0.2) , find the P(X ≥ 2) give your answer to 2 decimal places.

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If X~ B(6,0.2) , find E(X)

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If X~ B(6,0.2) , find VAR(X)

(a)  

A fair die is thrown 13 times. Find the probability that the number of fives obtained is between 2 and 4 inclusive. give answer to 3 decimal places

(a)