The mean score on a set of 15 exams is 74. what is the sum of the 15 exam scores?

Question

fwizbang · Answer

To find the mean you add up all the exam scores and divide  the number of exams.  $$ Mean= Sum of scores /number of exams$$

So if you know the mean and the number of exams, how do you find the sum of the scores?

pphalke · Answer

I have no clue

fwizbang · Answer

We know the mean is 74, and the no of exams is 15, so

 74 =(Sum of scores)/15

We want an equation that says Sum of Scores = Answer. What can 
we do to the right side of the equation that will leave the Sum of Scores
by itself?

pphalke · Answer

hmm...divide

pphalke · Answer

I mean multiply 74 by 15

fwizbang · Answer

THe sum is already divided by 15, so to make the 15 go away we should....

pphalke · Answer

multiply 74 and 15 to get 1,110

fwizbang · Answer

Perfect!