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Ulleksa [173]
3 years ago
10

there are five exams. the student earned grades 84,75,97, and 89 for the first four exams.what grade must the student earn pm th

e last exam to get an exam avergae of at least 85?
Mathematics
1 answer:
emmasim [6.3K]3 years ago
4 0

Answer:

81

Step-by-step explanation:

Given total number of tests are 5

The grades earned by the students in the tests are 84 , 75 , 97 , 89

let the grade earned by the student in the fifth test be x.

Average=\frac{84+75+97+89+x}{5}

The condition recquired is Average≥85

\frac{84+75+97+89+x}{5}≥85

\frac{344+x}{5}≥85

x+344≥425

x≥81.

The least grade the student can earn in the last test so that average is not less than 85 is 81

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