SOLUTION: in a class of 40, there are 10 boys at the age of 12 years 12 at the age of 12.5 years ant the rest at the age of 13. the average age of the boys in the class __________Years.
Algebra.Com
Question 696902: in a class of 40, there are 10 boys at the age of 12 years 12 at the age of 12.5 years ant the rest at the age of 13. the average age of the boys in the class __________Years.
Answer by RoshanAME(1) (Show Source): You can put this solution on YOUR website!
Ages of 10 boys= 12
Ages of 12 boys= 12.5
Ages of remaining(18 boys)= 13
Average age of boys= age of each boy/total no. of boys
That is, (10x12 12x12.5 18x13)/40
= (120 150 234)/40
= 504/40
= 12.6
The avg age of boys is 12.6 yrs
RELATED QUESTIONS
out of the 44 boys in a class 9 are of the age of 10, 15 at the age of 9, and the rest... (answered by ramkikk66)
The average age of 25 boys in a class is 12 years. If three boys aged 13, 14 and 15 and... (answered by Fombitz)
there are 30 boys and 60 girls in a class. if the average age of boys is 12 year and... (answered by TimothyLamb)
Out of 44 boys in class 9 are of the age of 10, 15 at the age of 9, and the rest are at... (answered by checkley79)
The mean age of class of 50 boys was 12 years. The average age of 20 of them was 11 and... (answered by richwmiller)
Eight students of average 13 years leave a class of 30 students of average age 15 years.... (answered by ramkikk66)
The average age of class 20 boys is 12 years. What will the average ago of class if 5 new (answered by ankor@dixie-net.com)
a girls age in 12 years time is the square of her present age. find her present age
(answered by Horlaye)
The average age of 30 boys in a class is 13 years , 9 more boys whose average age is 15... (answered by ankor@dixie-net.com)