Subtract of Exp variables

Bootsif

New member
Joined
Mar 6, 2020
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7
Hey, would like to get ideas how to solve the following problem.
The PDF of X is given by an exponential distribution Exp(
λ), the PDF of Y is given by an exponentioal disturbution Exp(λ).

Let Z to be defined as |X-Y|.
what is the correct answer ?

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