Answer:
Explanation:
The average can be found by adding up all the values and dividing by the number of values.
1. Add the values
The values are her five test scores: 100, 95, 75, 100, 80
Add them : 100+ 95+75+100+80 = 450
2. Divide by the number of values
She took five tests, so there are five values. Divide 450 by 5.
450/5=90 = 90%
Her average grade is 90%