# The average weight of 60 students is 50 kg. If 10 students of average

A. 50 kg

B. 50.5 kg

C. 50.25 kg

D. 53 kg

### Right Answer is: B

#### SOLUTION

Total weight of 60 students = No. of students Average = = 3000 kg

Total weight of replaced 10 students = No. of students Average = = 430 kg

Total weight of replaced 10 students and 10 new students = No. of students Average = = 890 kg

Total weight of 10 new students = Total weight of replaced 10 students and 10 new students – Total weight of replaced 10 students = 890 – 430 = 460 kg

Total weight of 60 students after replacement = Total weight of 60 students before replacement – Total weight of replaced 10 students + Total weight of 10 new students = 3000 – 430 + 460 = 3030 kg

Hence new average = 3030/60 = 50.5 kg

The average weight of 60 students is 50 kg. If 10 students of average