Maths question from Social Forest Worker exam, 2026 by JKSSB
The average score of 10 students in a class is 72. One student scored 90 marks, and another scored 30 marks less than the first. If these two students are removed, what is the new average of the remaining students?
Last updated Jul 21, 2026
Correct Answer:
Option A —
71.2
Step-by-Step Breakdown
1. Calculate the Total Score of All Students
The average score of 10 students is 72.
Multiplying 10 students by 72 gives a total combined score of 720 marks.
2. Find the Scores of the Two Removed Students
The first student scored 90 marks.
The second student scored 30 marks less than the first student, which gives 60 marks (90 minus 30).
Combined, these two students scored 150 marks (90 plus 60).
3. Calculate the Total Score of Remaining Students
Removing 150 marks from the total of 720 marks leaves 570 marks (720 minus 150).
Removing two students leaves 8 students remaining (10 minus 2).
4. Calculate the New Average
Dividing the remaining total of 570 marks by 8 students gives a new average of 71.25 marks (approximately 71.2).
Answer verified by Quintessence Classes faculty — Karan Nagar, Srinagar.
