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Having to do with standard deviation, and percent of scores. Please help me.

  1. Dec 6, 2008 #1
    1. The problem statement, all variables and given/known data

    The scores on an exam are normally distributed, with a mean of 77 and a standard deviation of 5. What percent of the scores are greater than 87?




    2. Relevant equations



    3. The attempt at a solution I don't understand what it is exactly that I have to do to get the answer. Please Help!
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Dec 6, 2008 #2
    You'll need to use the probability density function or the cumulative distribution function for the normal distribution. Which one?
     
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