SOLUTION: The mean age of class of 50 boys was 12 years. The average age of 20 of them was 11 and that of another 10 was 10. Find the average age of the remaining 10 boys.

Algebra ->  Average -> SOLUTION: The mean age of class of 50 boys was 12 years. The average age of 20 of them was 11 and that of another 10 was 10. Find the average age of the remaining 10 boys.       Log On


   

Question 806950: The mean age of class of 50 boys was 12 years. The average age of 20 of them was 11 and that of another 10 was 10. Find the average age of the remaining 10 boys.
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
50*12=600
20*11+10*10=320
(50*12-(20*11+10*10)+20x)/50=12
btw 50-20-10=20 not 10 more