### 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, $\begin{array}{l}\text{⇒ 25x – 60 + y = 25 (x +1)}\\ \text{⇒ 25x – 60 + y = 25x + 25}\\ \text{⇒ y = 85 kg}\end{array}$

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B. 21
C. 28
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A. 18
B. 20
C. 24
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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

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