Question

jacob's science teacher told him that his average score for the 7 tests this semester was 82. if jacob makes 100 on the next test, how high will his average be?

Answer 1

Jacob's score will be high by 2.25.

Explanation:

Average:

The ratio of total marks to the number of test.

`\textrm{Average score}=\frac{\textrm{Total number of score}}{\textrm{Number of test}}`

Jacob's average score was 82 for 7 tests.

Total score of Jacob was = (82×7)

=574

Jacob makes 100 the next test.

After this test, his total score=574+100

=674.

Now, he gave total (7+1)=8 test.

His average score will be

`=(674)/(8)`

=84.25

His average score will high = (84.25-82)

= 2.25.