Lifetime of a certain type of electronic device


Solve the below:

Q: The probability density function of X, the lifetime of a certain type of electronic device (measured in hours), is given by

f (x) = 10/x2 x > 10

f (x) = 0 x≤10

(a) Find P{X > 20}.

(b) What is cumulative distribution function of X?

 

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Basic Statistics: Lifetime of a certain type of electronic device
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