Average weight of 10 persons is 40 kg. A new person join the group and average weight of 11 persons becomes 42 kg. What will be the weight of new person?
Answer & explanation
Correct answer: option 3
Sum of weight of 10 persons = 10 x 40 = 400
Sum of weight of 11 persons = 11 x 42 = 462
Weight of new person = 462 - 400 = 62 kg