Question

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

Answer 1

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?

Answer 2

I have no clue

Answer 3

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?

Answer 4

hmm...divide

Answer 5

I mean multiply 74 by 15

Answer 6

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

Answer 7

multiply 74 and 15 to get 1,110

Answer 8

Perfect!