Question

The mean of 5 scores is 7. When an extra score is included, the new mean is 8. What is the extra score?

Answer 1

7 7 a a a as a as a a a a. A a a a a a a a. A. A a. A a

Answer 2

13

Explanation:

Mean of 5 scores = 7

Sum of 5 scores = 7*5 = 35

New mean = 8

Sum of 6 scores = 8 *6 = 48

Extra score = 48 - 35 = 13