Assume a postal code consists of 6 characters. Each character can be any letter from A to Z or any numeral from 0 to 9. Determine how many postal codes are possible in this situation?

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A: here use basic probability  probability = no of favorable outcomes total outcomes

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A: here from given information  p = probability of kitten is not gray  =  1 - 0.49 = 0.51  n =  4

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Q: If a random variable X is defined such that: E(X+4) = 10 and E[(X +4)²] = 114. Then the values of u…

A: The image is attached below.

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Q: Test scores for a given class are normally distributed with a mean of 80 and standard deviation 14.…

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A: here AS PER GUIDELINES I HAVE CALCULATED FIRST MAIN QUESTION KINDLY REPOST FOR REMAINING ' here use…

Q: 4.Suppose that X is a random variable for which E(X)=µ and Var(X)=o². Show that E(X(X-1)]=µ(µ-1)+o?

A: It is given that E(X) = μ and Var(X) = σ2

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Q: E(X+Y)

A: here given joint probability of (x,y) here possible value of x = 0,1  possible value of y  = 0,1

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