After taking 5 quizzes your average is 74 out of 100. What must your average score be on the next five quizzes to increase your average to 79?
After taking 5 quizzes your average is 74 out of 100.................?
84
After taking 5 quizzes your average is 74 out of 100.................?
84
First 5 gave u average of 74, total of 74*5 = 370
After 10 desired average is 79, total of 79*5 = 790
Therefore total of next 5 is (790-370)= 420
average 420/5 = 84
After taking 5 quizzes your average is 74 out of 100.................?
total of 5 quizzes is 74*5=370
total of 10 quizzes is 79*10=790
total of the second 5 quizzes=790-370=420
the average of the next 5 quizzes is 420/5=84
After taking 5 quizzes your average is 74 out of 100.................?
84
After taking 5 quizzes your average is 74 out of 100.................?
Let x = average score in the next 5 quizzes.
5x = sum of scores in the next 5 quizzes
74 = average score in the first 5 quizzes
5(74) = 370 = sum of scores in the first 5 quizzes
The average of all quizzes is the sum of the scores divided by 10.
(5x + 370)/10 = 79
Multiply by 10
5x + 370 = 790
Transpose and combine
5x = 420
Divide
x = 84
Therefore, your average in the next 5 quizzes must be 84.
^_^
After taking 5 quizzes your average is 74 out of 100.................?
83
After taking 5 quizzes your average is 74 out of 100.................?
84
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