Posted by Joseph on Friday, September 30, 2011 at 3:10am.
To a class of 28 pupils, 12 new pupils whose average age is 10 months less than the average age of the 28 are added. By how many months is the average age of the whole class lowered?

Math  Reiny, Friday, September 30, 2011 at 9:13am
Please do not repost the same question, while your previous post still shows up on the page.
Also be aware that most of our volunteer tutors live within a few hours of the above timezone, so at 3:10 am most of us are probably sleeping.
http://www.jiskha.com/display.cgi?id=1317364121
Answer This Question
Related Questions
 Math  To a class of 28 pupils, 12 new pupils whose average age is 10 months ...
 programmimg  There are 15 pupils in the Introduction to Programming I module. ...
 math  The average age of 24 pupils is 15 years while the average age of 16 ...
 programming  How can I write the algorithm in pseudocode to solve this problem...
 IT  Do the planning and write algorithm to solve for following problem. There ...
 math  Find the age, to the nearest month, of the people in your class. Use the ...
 stats  2. The average age of a child in kindergarten is 66 months. The standard...
 Programming  3.Do the planning and write algorithm to solve for following ...
 statistics  The average age of a child in kindergarden is 5 years or 60 months...
 statistics  The average age of a vehicle registered in the United States is 8 ...
More Related Questions