MBA
Exam
Numerical Ability
Age Problem
The average age of a group of children increases by 1 year if a 9 year old joins the group and decreases by 2 years if a 11 year old leaves the group. Find the number of children in the group. 1) 8 2) 6 3) 5 4) 7
Read Solution (Total 2)
-
- 5 children
If earlier average of group is x
and
no of children is n, then
nx+9= (n+1)*(x+1)
and
nx-11= (n-1)*(x-2)
solving it, we get n=5 , x=3 - 11 years agoHelpfull: Yes(0) No(0)
- 5 childern of avg. age 3
- 11 years agoHelpfull: Yes(0) No(0)
MBA Other Question