For a certain exam,a score of 58 was 2 standard deviations below mean and a score of 98 was 3 standard deviations above mean.What was the mean score W for the exam?
Pick
A) 74  B) 76  C) 78  D) 80  E) 82
A score of 58 was 2 standard deviations below the mean --&gt; 58 = Mean - 2d   A score of 98 was 3 standard deviations above the mean --&gt; 98 = Mean + 3d   Solving above for Mean W= 74.   74nswer: 74.
<result>A</result>
For a certain exam,a score of 58 was 2 standard deviations below mean and a score of 98 was 3 standard deviations above mean.What was the mean score W for the exam?