You have a mean score of 86 on 9 quizzes. The teacher decides to drop your lowest quiz score to determine your final quiz mean. After dropping the lowest score, your mean score on the 8 remaining quizzes is 88. What score was dropped?

Answer 1

let the score that was dropped be x

total of all the marks on 9 quizzes = 86*9 = 774
then (774-x)/8 = 88
solve for x

(hope you get 70)

Answer 2

sum/9 = 86
sum = 9*86 = 774
(sum - x)/8 = 88
sum - x = 704
774 - x = 704
x = 774 - 704
x = 70

Answer 3

Giovanni knows that 16/25 of his classmates are females. what percentage of his classmates are females.