Question

George has a goal to make an average of 90% for the first grading period. There will be 10 grades averaged together to determine the grade for the grading period. So far, George has the grades shown. What score does George need to reach his goal? 92, 86, 90, 79, 98, 75, 89, 98, 97

A) at least 72

B) at least 85                                                      C) at least 96 D) at least 100

Answer 1

The answer would be (c)

Answer 2

Option C

Explanation:

Given that:

George has a goal to make an average of 90% for the first grading period. There will be 10 grades averaged together to determine the grade for the grading period.

The first 9 grades scores were

92, 86, 90, 79, 98, 75, 89, 98, 97

Total of these 9 grades =804

He wants to get 90% average

This is equivalent to getting 900 as total for all 10 grades

Hence atleast he should get 900-804 = 96 score to make an average of 90%

Answer is option C