Aaden’s grades in math right now on quizzes are an 80, 75, 95, 0, and 83. If he makes up the quiz he has a 0 on and gets a 91, how much will his grade increase?

Answer 1

The key to solving this problem involves calculating averages. First, we calculate the average of the current grades by adding all the grades and dividing by the count of grades. There are 5 grades total.

80+75+95+0+83 = 333 = 66.6

5 5

If the 0 grade is replaced, the new average is calculated as follows:

80+75+95+91+83 = 424 = 84.8

5 5

The grade increase is the new average minus the old average:

84.8 - 66.6 = 18.2