Average weight of 15 persons is 30 kg. A new person whose weight is 78 kg joins the group. What will be the average weight of 16 persons ?
Answer & explanation
Correct answer: option 3
Sum of weight of 15 persons = 15 x 30 = 450
Sum of weight including new person = 450 + 78 = 528
Average weight of 16 persons = 33 kg