Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Density function

  1. Sep 3, 2007 #1
    A continuous random variable X has the density function
    f(x)=x for 0<x<1
    2-x for 1 _<x<2
    0 elsewhere.
    a. Show that P(0<X<2)=1
    B. Find P(X<1.2).

    Please see the attached file.

    Attached Files:

    • 1-1.doc
      File size:
      20 KB
  2. jcsd
  3. Sep 3, 2007 #2


    User Avatar
    Science Advisor

    1. A lot of people will not open files for fear of viruses.

    2. Here, there was no point in attaching the file since it doesn't say anything you haven't written here! In particular, there is not attempt at the problem youself.
    How is P(a< X< b) defined for any probability density function f(x)? Where exactly is your difficulty?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook