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Math Help - Probability Distributions

  1. #1
    Junior Member
    Joined
    Dec 2009
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    30

    Probability Distributions

    Ive worked out how to do parts a,b and c but i dont understand why the graph for fx(x) at x=3 goes down from 4 to 3 then back to 4,why isnt it a straight line from at x=3 to x=4 like shown at x=0 and x=1,help much appreciated
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