If the average weight of 10 students is 25 kg and that of other 10 students is 35 kg, then the average weight of these 20 students is:
Answer & explanation
Correct answer: option 1
average weight of 10 students = 25 kg
sum of weights = 250 kg
average of other 10 students = 35 kg
sum of weights = 350 kg
Sum of weights of 20 students = 600 kg
average of 20 students = 600/20 = 30 kg
The correct answer is Option (1) → 30 kg