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Linear Programming and Prob, Combinations etc

  • 12-06-2005 8:18pm
    #1
    Johnerr
    Registered Users, Registered Users 2 Posts: 240 ✭✭


    Doing a paper there, and these are the two questions i have been having trouble with,

    Linear programming, i don't know what to do for the Part a's

    and Probility and combinations i find the probility part pretty confusing, any ideas about the part a's in linear more importanly


Comments

  • #2
    *marie*
    Registered Users, Registered Users 2 Posts: 332 ✭✭*marie*


    Usually you have to change the = to a \< sign, sub in (0,0) for x and y and if it is true, the arrow points towards the origin (0,0)
    Eg:
    write out an inequalitiy that satisfies the equation 2x+3y=14
    Sub (0,0): 2(0)+3(0)=14 => 0+0=14. zero IS less than 14 so the arrows point towards the origin, therefore you know to use \< rather than >/. Whereas if it was 0+0= -14(which it almost never is), you'd know -14 isn't more than zero, so you'd use the other sign.
    Too confusing?


  • #3
    PaulMcG
    Closed Accounts Posts: 110 ✭✭PaulMcG


    http://www.examinations.ie/main.php?l=en&mc=en&sc=ep - have a look at the marking schemes and it'll also tell you how to do the question.


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