AFCAT I 16 Feb 2019 Paper

(c) Total age of students who promoted in class VIII is
= n.Y years.
When 3 more students included this college.
= n .Y + Y -1 + Y -2 + Y + 3
= ny + 3y
After two years when they are in Xth total age
= n(Y + 2) + 3(Y + 2)
Avg age =

n(Y+2)+3(Y+2)

(n+3)

=

(n+3)(Y+2)

(n+3)

= y + 2