Problema Solution
suppose your average, after taking 4 quizzes, is 73 (out of 100). what must your average be on the next 5 quizzes to increases your average to 83 out of 100?
Answer provided by our tutors
If the average after taking 4 quizzes is 73 the sum of the scores of those 4 quizzes is:
4*73 = 292
Let 'x' represent the average on the next 5 quizzes then the sum of the scores of those 5 quizzes is:
5x
The average of all 9 quizzes is 83 means:
(292 + 5x)/9 = 83
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click here to see the equation solved for x
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x = 91
The average on the next 5 quizzes should be 91.