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Need help in Mean, Probability & SD

  1. Apr 19, 2007 #1
    The placement data of a business school suggest that the percentage of students securing a job with a multinational during the years 1996, 1997 and 1998 are 20%, 30% and 40% respectively. One student is chosen at random from the graduating batch of each year. Let X be the number of students, out of the three so selected who had secured a job with a multinational. Calculate the following:

    a) The probability distribution of X
    b) The Mean of X
    c) The Standard Deviation of X
  2. jcsd
  3. Dec 16, 2011 #2
    Can anyone post answer of this?

  4. Dec 17, 2011 #3
    Are you asking for sumans? Can't sumans speak for him/herself? In any case, his/her question is over 4 years old and if this was a homework question, it should have been posted in that forum. When posting questions, the poster should show an attempt at a solution.
    Last edited: Dec 17, 2011
  5. Dec 17, 2011 #4


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    This thread is 4 years old.
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