SSC GD Constable 4 Feb 2025 Shift 2 Paper

Total age of students $=$ Average age × Number of students
Total age of the group $=$ Average age × Number of people in the group
Age of the teacher $=$ Total age of the group - Total age of students
Calculation:
Total age of 48 students $=22\times 48$
⇒ Total age of 48 students = 1056
Total age of 49 people (students + teacher) = $23\times 49$
⇒ Total age of 49 people $=1127$
Age of the teacher $=$ Total age of 49 people - Total age of 48 students
⇒ Age of the teacher $=1127-1056$
⇒ Age of the teacher $=71$