Problema Solution
suppose your average, after taking 4 quizzes, is 74 (out of 100). what must your average be on the next 5 quizzes to increase your average to 84 out of 100?
Answer provided by our tutors
Average = 74 for 4 quizzes
So total marks = 74 * 4 = 296
Let the average of next 5 quizzes is x ,then
Total marks for 5 quizzes = 5x, so
(296 + 5x)/9 = 84
296 + 5x = 84*9
5x = 756 - 296
5x = 460
x = 460/5
x = 92
Therefore,
The average should be 92 for next 5 quizzes.