let total weight of 59 students(except 45kg student) be xlet y be original average of 60 studentsso, (x+45)/60 = y  ---- (i) the average after 45kg student left: x/59 = y+0.2  ----- (ii)so, solving above both equations, we gety = 56.8So, average weight of 59 student is:y+0.2 = 56.8+0.2 = 57kgBut in the tutorial, sir said the answer is 56.8 kg.

let total weight of 59 students(except 45kg student) be xlet y be original average of 60 studentsso, (x+45)/60 = y  ---- (i) the average after 45kg student left: x/59 = y+0.2  ----- (ii)so, solving above both equations, we gety = 56.8So, average weight of 59 student is:y+0.2 = 56.8+0.2 = 57kgBut in the tutorial, sir said the answer is 56.8 kg.

The correct ans is 57.

In Practice Question of average: Average Advance 2 When a student weighing 45 kgs left a class, the average weight of the remaining 59 students increased by 200g. What is the average weight of the remaining 59 students?

In Practice Question of average: Average Advance 2 When a student weighing 45 kgs left a class, the average weight of the remaining 59 students increased by 200g. What is the average weight of the remaining 59 students?