Number of Motorcycles

question 117

Essay

Number of Motorcycles
The probability distribution of a discrete random variable X is shown below,where X represents the number of motorcycles owned by a family. ​ ​
-{Number of Motorcycles Narrative} Apply the laws of expected value and variance to find the following:
a.V(3X)
b.V(3X − 2)
c.V(3)
d.V(3X)− 2

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Definitions:

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