1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Probability Problems.

  1. Feb 3, 2007 #1
    Let [tex]P(X\leq \15)= 0.3, P(15\less X \leq24)=6[/tex] and (P X > 20) = 0.5

    I don't understand how I would find this probability: [tex]P(15\lessX\leq20[/tex]

    The answer is 0.2.
    Last edited: Feb 3, 2007
  2. jcsd
  3. Feb 3, 2007 #2


    User Avatar
    Homework Helper

    Are you sure you posted the problem correctly? The probability of an event cannot equal 6, first of all.
  4. Feb 3, 2007 #3
    You are correct, the problem is not posted correctly. My latex coding is lacking...I wish there were a way a could delete this post.
  5. Feb 3, 2007 #4


    User Avatar
    Staff Emeritus
    Science Advisor

    Is it meant to be 0.6 by any chance? Thus, is your first equation meant to be [tex]P(X\leq \15)= 0.3,\ \ P(15< X \leq24)=0.6,\ \ P(X>20)=0.5[/tex], and you want to find [tex]P(15< X \leq20)[/tex]?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook