Explore BrainMass

Probability density function

#4. 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?
.. (see attachment)


Solution Preview

Hello and thank you for posting your question to Brainmass!
The solution is attached below in two files. the files are identical in ...

Solution Summary

this shows how to find the cumulative distribution function.