Graduate Record Exam (GRE) has a combined verbal and quantitative mean of 1000
and a standard deviation of 200. Scores range from 200 to 1600 and are
approximately normally distributed. For each of the following problems:
a rough sketch, darkening in the portion of the curve that relates to the
the percentage or score called for by the problem.
percentage of the persons who take the test score above 1300?