Question

Angie wants to earn a 90% for her overall history grade. During the course

she has to take 5 tests. So far, she has only taken 4 tests. Her exam
scores for the tests are as follows: 85, 83, 99, 95. If Angie wants to ensure
she will receive a 90%, what is the minimum score on the 5th test that she
can receive?

Answer 1

Angie needs on her fifth test to achieve an overall grade of 90%, we can use the following formula:

( Total score on all 5 tests ) / ( Number of tests ) = Desired overall grade

Let x be the score that Angie needs on her fifth test. Then, we can plug in the given information and solve for x:

( 85 + 83 + 99 + 95 + x ) / 5 = 90

Multiplying both sides of the equation by 5 gives:

85 + 83 + 99 + 95 + x = 450

Adding the scores together and subtracting from both sides gives:

x = 88