Question

Brett earned scores of 98,100,65,78,98,35,100,45 and 50 on his reading tests. What is the mean of bretts scores

Answer 1

The mean of Brett's scores are 74.33.

Explanation:

The mean is the average of the numbers. It is easy to calculate: add up all the numbers, then divide by how many numbers there are. In other words it is the sum divided by the count.

- (669, in our case) SUM / COUNT of units, (this case it is 9)

MATH:

SUM = 98 + 100 + 65 + 78 + 98 + 35 + 100 +45 + 50

SUM = 669

COUNT = 98,100,65,78,98,35,100,45,50 - How many numbers are there total?

COUNT = 9

SUM

-------------------------- - SUM over COUNT

COUNT

SUM / COUNT = ?

669 / 9 = ?

= 74.33