Friday

March 6, 2015

March 6, 2015

Posted by **don** on Saturday, August 18, 2012 at 2:42am.

- math -
**drwls**, Saturday, August 18, 2012 at 3:47amYour average was 18/25 = 72% and you want to raise it to 75%. You need a grade x (in percent) such that

4*72 + x = 5*75

x = 5*75 - 4*72 = 87

- math -
**David Q/R**, Saturday, August 18, 2012 at 4:02amAn average of 18 out of 25 is 72%. I need to increase that by 3% to 75% by the time the marks from my final exam are included. Each exam is scored out of 25. Then so far I've got 72% out of a possible 100 marks, which is 72 marks. I need to get 75% overall by the time I've taken the fifth exam, which means I need to get a total of 75% x (5x25) = 93.75 marks. I've got 72 of them so far, so I need another 93.75 - 72 = 21.75 marks, which is 87%. (Note that I've assumed that every exam is scored out of the same number of marks: if they're not, then this calculation wouldn't work.)

**Answer this Question**

**Related Questions**

math - Sammy got an average of 85% in four tests threethree of the scores were ...

MATH - Katie must take five exams in a math class. Her scores on the first four ...

statistics-?mean average with lowest number out? - A mean average of 60 on 7 ...

statistics-?mean average with lowest number out? - A mean average of 60 on 7 ...

Statistic- Average - A mean average of 60 on 6 exams is needed to pass a course...

Math (Algebra 1) - Juan’s first 3 exam scores are 85, 93, and 87. What does he ...

algebra (i need help calculating my grade) - i have exams tomorrow and i would ...

math - wai ling averaged 84 on her first three exams and 82 on her next 2 exams....

algebra - Mike needs at least a 75% average to pass his math course. The class ...

Algebra 2 - A teacher announces that exams count 20% of the 1st quarter's ...