Question

Stephen earned scores of 88 points, 94 points, 89 points, and 85 points on four tests. What is the lowest score he can get on the fifth test and still finish with an average score of 90 points?

Answer 1

94 Points must be scored in order to get an average of 90 for his grade.

Answer 2

The lowest score Stephen can get on the fifth test = 94 points

Explanation:

The marks scored by Stephen in test one = 88 points

The marks scored by Stephen in second test = 94 points

The marks scored by Stephen in test third = 89 points

The marks scored by Stephen in test fourth = 85 points

Let The marks scored by Stephen in test fifth be x points

Now, The average score in all the tests = 90 points

Sum of all the five tests = 88 + 94 + 89 + 85 + x

⇒ Sum of all five tests = 356 + x

Now, Average × 5 = Sum of five tests

⇒ 90 × 5 = 356 + x

⇒ 450 - 356 = x

⇒ x = 94

Therefore, The lowest score Stephen can get on the fifth test = 94 points