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

48 kg

Explanation

Total weight of 36 students = `( 41 xx 36) ` kg = 1476 kg
New mean = ( 41-0.2) kg = 40 .8 kg
Total weight of 35 students = ` ( 40.8 xx 35)` kg = 1428 kg