Results 1 to 2 of 2

Math Help - Average value

  1. #1
    Newbie
    Joined
    Jan 2009
    Posts
    2

    Average value

    An event has a 60% chance of occurring each time. If you need this event to occur 10 times in a row to succeed, how do you determine the average number of attempts that will occur for a failure.

    Trying to answer the question of total number of attempts:

    (attempts to make it to 10 occurrences)*(ave. number of occurrences per failure) = total number of attempts needed on average

    1/(0.6^10)*X = total number of attempts needed on average
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Newbie
    Joined
    May 2008
    Posts
    21

    After an Excel spreadsheet

    The answer is 1.439166 as the average number of failures. Failure can occur after 0-9 successes.Each of these probabilities is multiplied by the number of successes and the sum divided by the probability of 1- success=.993953.

    For example the probability of 5 successes and then a failure is (.6^5)*.4=.05184.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 5
    Last Post: May 26th 2011, 05:11 AM
  2. Replies: 2
    Last Post: March 13th 2010, 04:49 AM
  3. Average Value
    Posted in the Calculus Forum
    Replies: 1
    Last Post: May 28th 2009, 04:06 AM
  4. Average Value
    Posted in the Calculus Forum
    Replies: 1
    Last Post: May 27th 2009, 10:14 AM
  5. average
    Posted in the Statistics Forum
    Replies: 3
    Last Post: March 20th 2009, 04:20 AM

Search Tags


/mathhelpforum @mathhelpforum