# Question #3ef43

##### 1 Answer

Jul 20, 2017

New mean

#### Explanation:

The formula to calculate mean is:

This means we also have the formulae

If the mean of 6 tests was

If the student writes another test, the total will increase and the number of tests increases.

New total

New number

We expect the new mean to be lower, because the last test score was less than the average for the first