Questions (1-3)

8Let the random variable X have a discrete uniform distribution with parameter k=3 and with values

10,11, and 12.

(1)The mean of X is:

A

B

C

D

0.10

1.50

11

1

(2)The variance of X is:

A

B

C

D

1

(3)) P(11

A

B

C

D

0.67

0.33

0.0

0.46

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