Q345
Average weight of 25 persons is increased by 1 kg when one person weighing 60 kg is replaced by a new person. Weight of new the person is-
A.
50 kg
B.
61 kg
C.
86 kg
D.
85 kg
AnswerAnswer: Option D
Solution
Answer: Option D
Solution:
Let the weight of 25 person's = 25x kgAnd the new person's weight = y kg
According to the question,
⇒ 25x - 60 + y = 25 (x +1)
⇒ 25x - 60 + y = 25x + 25
⇒ y = 85 kg