# Jane has scored the following marks on the first #5# exams: #65, 70, 55, 87, 87.# What is the minimum score she must achieve on the last exam if she is to reach her target of a #70%# average?

##### 2 Answers

Sep 20, 2017

#### Answer:

#### Explanation:

where

So

Sep 20, 2017

#### Answer:

She needs at least

#### Explanation:

From this we can calculate the

If the average for

Jane's total after

Therefore in the last exam she should score a mark of at least: