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 September 26th, 2008, 09:45 PM #1 Senior Member   Joined: Sep 2008 Posts: 199 Thanks: 0 simple probability distribution Got stuck here ,, someone pls explain The marks of history in a test are normally distributed with a mean of 55 and a standard deviation of 8 . ( a ) if 10.2 % of the students failed History , find the minimum marks needed to pass ( b ) If 73.4% of the students scored a credit in History , find the minimum marks to score a credit thanks 4 ur help
 September 27th, 2008, 11:55 AM #2 Global Moderator     Joined: Nov 2006 From: UTC -5 Posts: 16,046 Thanks: 938 Math Focus: Number theory, computational mathematics, combinatorics, FOM, symbolic logic, TCS, algorithms Re: simple probability distribution Where did you get stuck? I just see the problems.
 September 27th, 2008, 09:10 PM #3 Senior Member   Joined: Sep 2008 Posts: 199 Thanks: 0 Re: simple probability distribution not really stuck,, don know how to start , can u pls show me the steps .THanks

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