Grades in three tests in College Algebra are 87,59 and 73. The average after final is 75 To calculate:The points needed on the final to average the points to 75.

Harlen Pritchard 2021-01-10 Answered
Grades in three tests in College Algebra are 87,59 and 73.
The average after final is 75
To calculate:The points needed on the final to average the points to 75.
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Expert Answer

Layton
Answered 2021-01-11 Author has 89 answers
Calculation:
Let the grade in the final test be x
Average of n numbers a1+a2+a3+...+an is given by A=a1+a2+a3+...ann
Plugging the values,
A=87+59+73+x4
Given average is 75
Therefore,
75=87+59+73+x4
Multiplying both sides by 4
754=87+59+73+x44
300=219+x
Subtracting 219 from both the sides, 300219=219+x219
81=x
x=81
Therefore the score required in final test to get an average of 75 is 81.
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