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 Answer: Option D

Solution(By Apex Team)

Let the weight of 25 person’s = 25x kg And the new person’s weight = y kg According to the question, $\begin{array}{l}\text{⇒ 25x – 60 + y = 25 (x +1)}\\ \text{⇒ 25x – 60 + y = 25x + 25}\\ \text{⇒ y = 85 kg}\end{array}$

Related Questions On Average

A. 20
B. 21
C. 28
D. 32

A. 18
B. 20
C. 24
D. 30

A. 10 years
B. 10.5 years
C. 11 years
D. 12 years

If the arithmetic mean of 0, 5, 4, 3 is a, that of -1, 0, 1, 5, 4, 3 is b and that of 5, 4, 3 is c, then the relation between a, b, and c is.

A. a = b = c
B. a : b : c = 3 : 2 : 4
C. 4a = 5b = c
D. a + b + c = 12