Results 1 to 4 of 4

Math Help - probability kills

  1. #1
    Junior Member
    Joined
    Sep 2012
    From
    Kota
    Posts
    73

    probability kills

    John has 3 unique coins such that getting head from them is 1/100, 2/100 & 3/100 respectively. If he flips each of the 3 coins once, what is the probability of getting at least 1 head.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Senior Member
    Joined
    Feb 2013
    From
    Saudi Arabia
    Posts
    441
    Thanks
    86

    Re: probability kills

    Getting at least one head means that you will not get 3 tails.
    P(3Tails) = 0.99x0.98x0.97=0.941
    Therefore P( at least one H) =1-0.941=0.059
    Minoas
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Member
    Joined
    Feb 2010
    From
    in the 4th dimension....
    Posts
    122
    Thanks
    9

    Re: probability kills

    Quote Originally Posted by geniusgarvil View Post
    John has 3 unique coins such that getting head from them is 1/100, 2/100 & 3/100 respectively. If he flips each of the 3 coins once, what is the probability of getting at least 1 head.
    I am not sure,only trying... probability is the the most confusing part of math...do you have the answer?

    probability of getting tail from first coin=1-1/100=99/100
    probability of getting tail from first coin=1-2/100=98/100
    probability of getting tail from first coin=1-3/100=97/100

    probability of getting all tails=99/100*98/100*97/100=941094/1000000
    probability of getting at least one heads=1-941094/1000000=29453/500000 which is roughly 5.890% chance...
    Follow Math Help Forum on Facebook and Google+

  4. #4
    MHF Contributor

    Joined
    Apr 2005
    Posts
    15,792
    Thanks
    1532

    Re: probability kills

    Minoanman beat you by six minutes!
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 1
    Last Post: July 11th 2012, 05:42 AM
  2. Replies: 10
    Last Post: January 21st 2011, 11:47 AM
  3. Replies: 3
    Last Post: May 29th 2010, 07:29 AM
  4. Replies: 1
    Last Post: February 18th 2010, 01:54 AM
  5. Replies: 3
    Last Post: December 15th 2009, 06:30 AM

Search Tags


/mathhelpforum @mathhelpforum