Question

A student scores 73 out of 100 on a test. If the maximum score on the next test is also 100​ points, what score does the student need to maintain at least an average of 79 ​?

Answer 1

Because the student scored 73/100 on the first test, their current average is 73%.

To calculate the avergae with the next test score, you add both percentages the student gets together and then divide by 2.

79 = (73 + x) / 2

Multiply by 2 on both sides

158 = 73 + x

Subtract 73 on both sides

x = 85

So the student needs to get at least an 85/100 on the next test to maintain a 79 average.