In a class there are 50 students. Their average weight is 45 kg. When a student leaves the class, the average… · ABC26GN1511
Subject: General Aptitude · Chapter: Average · Exam: R.R.B. 2006
In a class there are 50 students. Their average weight is 45 kg. When a student leaves the class, the average is reduced by 100 g. Find the weight of the student who left the class.
Answer
No answer key was printed for this question.
Explanation
Total weight of 50 students = (45 × 50) kg = 2250 kg. Average weight of 49 students = (45 kg – 100 g) = 44.9 kg. Total weight of 49 students = (44.9 × 49) kg = 2200.1 kg. \ Weight of the student who left the class = (2250 – 2200.1) kg = 49.9 kg.
Explanation as extracted from the printed page; notation may be imperfect.