Answer:
81%
Step-by-step explanation:
Average score= total score ÷number of tests
To find the average score for all ten tests,
① Find the total score for all ten tests
② Divide the total score by the number of tests, 10
Let's find the total score for the 1st 4 tests first.
Total score
= 4(75%)
= 300%
For the next 6 tests,
total score
= 6(85%)
= 510%
Total score for 10 tests
= 300% + 510%
= 810%
Average score
= 810% ÷10
= 81%
