Total marks of 28 students = 28 × 50 = 1400 Marks of remaining 20 students = 20 × 55 = 1100 Marks of students who left = 1400 − 1100 = 300 Average marks of students who left = 300 ÷ 8 = 37.5
The average marks of 28 students in Mathematics was 50. 8 students left the school and then the average increased by 5. What is the average of marks obtained by the students who left the school?
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Question context
This question is part of 📏 Arithmetic Aptitude within the broader 🧠 Aptitude Mastery subject and appears in the ASF Airports Security Force preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.