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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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