Saturday

September 20, 2014

September 20, 2014

Posted by **Joe** on Sunday, March 8, 2009 at 11:42am.

- college algebra -
**Hannah Xx**, Sunday, March 8, 2009 at 11:47am66.5%

- college algebra -
**Joe**, Sunday, March 8, 2009 at 12:08pmthanks for the answer but can you please show how you got that answer

- college algebra -
**mark**, Sunday, March 8, 2009 at 12:36pmthe tests improve by 3 points, therefore:

test 1 x

test 2 x+3

test 3 x+6

test 4 x+9

the mean is the sum of the test scores divided by the number of tests. also, we know the mean = 69.5%

therefore, we get the equation:

(4x+18)/4 = 69.5%

4x+18 = 278

4x = 260

x = 65

therefore the score on the first test was 65%

**Answer this Question**

**Related Questions**

social science statistics - a professor was curious to whether the students in a...

algebra - Briana's second test score was 8 points higher than her first score. ...

algebra - Jacob has a mean score of 78 after his first four math tests. He wants...

math - A teacher allows the students to each "throw out" their lowest test score...

graduate statistics - A nursing professor was curious as to whether the students...

math - A student has a mean score of 88 on five tests taken. What score must she...

math - Adam took five tests and received a grade for each of them. The first ...

statistics - The mean score for all individuals who took the Law School ...

statistics - The mean score for all individuals who took the Law School ...

MATH - If the mean score on a set of 24 tests is 81and two more students took ...