CMAT 2021 Solved Question Paper

Initially number of engineers =252
∴ Number of electronic engineers =

252×2

3

=168 and number of computer engineers =252−168=84
Let the new number of computer engineers recruited be x.
∴ According to the question,

168

84+x

=

1

1

⇒168=84+x
⇒ x=84
Total age of all the engineers
=336×22=7392‌yr
Let the average age of all electronic engineers be y yr.
∴ 168×y+168(y−2)=7392
⇒ 336y−336=7392
y=23‌yr
∴ Average age of all computer engineers
=23−2=21‌yr
∴ Only Statement B and C are correct.