Homework Help: hard math

Posted by Preston on Friday, October 3, 2008 at 8:50pm.

42 students took a test in school where the passing score was 70. the mean score of the 42 students taking the exam was 75.5 while the mean score of the students who passed the test was 81, and the mean score of the students who failed was 60. How many students passed the test?

hard math - Ms. Sue, Friday, October 3, 2008 at 9:00pm
Please study the answer that Reiny posted for you yesterday.

http://www.jiskha.com/display.cgi?id=1222979610
- bsvatjcru qlsgojc - bsvatjcru qlsgojc, Monday, December 22, 2008 at 2:18pm
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hard math - susan, Friday, October 3, 2008 at 10:55pm
34 people passed the test

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