Leah’s average for the past three quizzes in history is 84. What must she make on the fourth quizzes to increase her average to 88?

Answer 1

To find out what Leah must make on the fourth quiz, we first need to determine the sum of her scores on the first three quizzes.

Her average score for the past three quizzes is 84, so the sum of her scores is 84 * 3 = <<84*3=252>>252.

To increase her average to 88, the sum of her scores on all four quizzes must be 88 * 4 = <<88*4=352>>352.

To determine what Leah must make on the fourth quiz, subtract the sum of her scores on the first three quizzes from the sum of scores needed for an 88 average: 352 - 252 = <<352-252=100>>100.

Therefore, Leah must make a score of 100 on the fourth quiz to increase her average to 88.