Question: Suppose X is a random variable with mean 10 and variance 25. Suppose Y is a random variable with mean 20 and variance 9. X

Suppose X is a random variable with mean 10 and variance 25.

Suppose Y is a random variable with mean 20 and variance 9.

X and Y are independent.

What is the standard deviation of the difference X - Y?

Group of answer choices

16

34

square root of 34

4

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