Question: Let X be a random variable with the following probability distribution: Value x of X P = Xx 1 0.15 2 0.55 3 0.05 4

Let

X

be a random variable with the following probability distribution:

Value

x

of

X

P=Xx

1

0.15

2

0.55

3

0.05

4

0.15

5

0.10

Find the expectation

EX

and variance

VarX

of

X

.

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