The average weight of 6 girls is increased by 2.5 kg when one of the girls whose weight is 38 kg is replaced by a new girl. Find the weight of the new girl.
Answer & explanation
Correct answer: option 3
Total increment in age of 6 girls = 6 × 2.5 = 15 kg
So , Weight of new girl = 38 + 15
= 53 kg