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need some help please guys with my sons maths homework

  • 23-01-2012 10:06PM
    #1
    lolabunny
    Registered Users, Registered Users 2 Posts: 19 ✭


    this is question
    helen plays hockey she can win lose or draw so proabilty is she will win must be 1/3 explain why statement is wrong :confused::confused::confused::confused::confused::confused:help


Comments

  • #2
    srsly78
    Registered Users, Registered Users 2 Posts: 7,157 ✭✭✭srsly78


    The proposition says nothing about the weighting of the probabilities. It does not say there is an equal chance of any of the 3 possible outcomes. Therefore it is incorrect to conclude that the chance of winning is 1/3.


  • #3
    whiteandlight
    Closed Accounts Posts: 2,359 ✭✭✭whiteandlight


    The outcomes are not equally likely so the probabilities are not equal.

    Think of it this way. If Manchester united were playing an under 8 amateur team would you expect Manchester united to have a 1/3rd chance of winning losing or a draw? The answer is no because ManU are far far more likely to win the match than to lose or draw. A more realistic probability would perhaps be a 9/10 or more chance of Man U winning.

    Not sure if that helps


  • #4
    lolabunny
    Registered Users, Registered Users 2 Posts: 19 ✭lolabunny


    thankyou so much for your help:D:D


  • #5
    Capt'n Midnight
    Moderators, Recreation & Hobbies Moderators, Science, Health & Environment Moderators, Technology & Internet Moderators Posts: 96,050 Mod ✭✭✭✭Capt'n Midnight


    if either team has the same RANDOM chance of scoring ONE point then there are 4 possible results

    0:0
    0:1
    1:0
    1:1

    in which case there is a 50% chance of a draw ( two draws in four games)


    In the real world though
    what are the typical scores in hockey ?

    in high scoring games it's the reverse
    the chances of both teams getting the exact same score are smaller
    in racing the chances of a draw to the exact 1/00th of a second are very, very small


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