SOLUTION: The average age of a class of 20 students is 15 years and the average age of another class of 30 students is 20 years. Find the average age of the two classes

Algebra ->  Customizable Word Problem Solvers  -> Age -> SOLUTION: The average age of a class of 20 students is 15 years and the average age of another class of 30 students is 20 years. Find the average age of the two classes      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 1086318: The average age of a class of 20 students is 15 years and the average age of another class of 30 students is 20 years. Find the average age of the two classes
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
[ ave age ] = [ total of the ages ] / [ number of student ]
+15+=+t%2F20+
+t+=+300+
and
+20+=+t%2F30+
+t+=+600+
[ ave age ] = [ total of the ages ] / [ number of student ]
+%28+600+%2B+300+%29+%2F+%28+20+%2B+30+%29+
+900+%2F+50+
+18+
The average age of the 2 classes is 18