I have two exponentially distributed independent random variables A and B.

The expectations of $A$ and $B$ are $2$ and $1$ respectively

What is the probability that $B > A$?


closed as off-topic by StubbornAtom, lulu, JMoravitz, Foobaz John, NCh Feb 19 at 2:25

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  • 2
    $\begingroup$ Have you written down the joint density? $\endgroup$ – ncmathsadist Feb 18 at 17:05
  • $\begingroup$ I'm not sure how I would go about doing that, could you help? $\endgroup$ – joebloggs Feb 18 at 17:28
  • $\begingroup$ Strange that this question appeared just before $\endgroup$ – Foobaz John Feb 18 at 17:37
  • $\begingroup$ And this question also appeared recently. What is the source of this question? $\endgroup$ – lulu Feb 18 at 17:44

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