Results 1 to 2 of 2

Math Help - timers Q - need help

  1. #1
    Newbie
    Joined
    May 2006
    Posts
    12

    timers Q - need help

    can anyone help me with this quesiton pleasee

    The technical support group for the 1992 Winter games has ten electronic timers that can be used for five events. The events are run concurrently at different sites. Three of the events each require only one timer, but the other two each require two timers. One of the ten timers has a malfunction that makes it inaccurate.

    a) What is the probability that timing is inaccurate in one of the events requiring two timers? 0.40
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Super Member
    earboth's Avatar
    Joined
    Jan 2006
    From
    Germany
    Posts
    5,829
    Thanks
    123
    Quote Originally Posted by aptiva
    can anyone help me with this quesiton pleasee
    The technical support group for the 1992 Winter games has ten electronic timers that can be used for five events. The events are run concurrently at different sites. Three of the events each require only one timer, but the other two each require two timers. One of the ten timers has a malfunction that makes it inaccurate.
    a) What is the probability that timing is inaccurate in one of the events requiring two timers? 0.40
    Hello,

    you deal with binomial distribution. The probability to use an inaccurate timer is 0.1. So

    P(X=1)={10\choose 1} \cdot \left({1\over 10}\right) \cdot \left({9\over 10}\right)^9 \approx .3874

    Greetings

    EB
    Follow Math Help Forum on Facebook and Google+

Search Tags


/mathhelpforum @mathhelpforum