Problema Solution
Suppose your average, after taking 3 quizzes, is 71 (out of 100). What must your average be on the next 5 quizzes to increase your average to 86 out of 100?
Answer provided by our tutors
Let 'x' represent the average of the next 5 quizzes then the total from this 5 quizzes is: 5x
The total from the first 3 quizzes is: 3*71 = 213
The average of the 8 quizzes is 86 means:
(213 + 5x)/8 = 86
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click here to see the equation solved for x
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x = 95
The average of the next 5 quizzes must be 95.