Question

5. Lakita's test scores are 87, 96, 81, and 89.

What score does she need on the last test in
order to average 90 on her tests?
[5]

Answer 1

Answer: 97

Explanation:

Average: All the numbers added divided by the number of numbers

Start adding the smallest grade in her notes: 87+96+81+89+81= 434/5= 86.8

Keep adding 1 to the last grade until you find a number that gives us an average of 90.

87+96+81+89+97+ 450

Then divide it by the amount of grades

450/5= 90