Question

Candy Corn received scores of 93,87, and 85 on her first three exams of the grading period. Candy must earn at least what score on the next exam for the test average to be at least a 90 for the grading period.

Answer 1

Answer:

95

Step-by-step explanation:

To find average, you add all of the numbers up and divide by the amount of numbers you have. In this case, you have 3 scores, and then you're looking at another score, so you have a total of 4 numbers. We can set up an equation using this:

$\frac{93 + 87 + 85 + x}{4} =90$

When you simplify, you get:

$\frac{265 + x}{4} = 90$

Simplify further by multiplying 4 on both sides:

$265 + x = 360$

Solve for x:

$x = 95$