Friday

April 25, 2014

April 25, 2014

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.)

**Related Questions**

math - Scott had an average of 83 on his first three exams. He later scored an ...

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

math - nadia has taken 3 exams and her average score so far is 80.If she gets ...

math - omar has taken 4 exams and his average score so far is a 79.If he gets ...

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

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 ...

math - A mean average of 60 on 7 exams is needed to pass a course. on his first ...

Exams help - Hello I am a Grade 11 student , I am willing to resit my maths exam...

math - mikes average on the first four exams in econ 1A is 88. what must he earn...