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**The average weight of 15 students in a class increases by 1.5 kg when one of the students weighing 40 kg is replaced by a new student. What is the weight (in kg) of the new student ?
**

A. 64.5 kg B. 56 kg C. 60 kg D. 62.5 kg
**Answer: Option D**

## Show Answer

Solution(By Apex Team)

Let the weight of 1 student = x kg The weight to 15 student = 15x kg Let the weight of new comer = y kg $\begin{array}{l}\text{∴ According to the question,}\\ \text{ 15x – 40 + y = 15 (x + 1.5)}\\ \text{⇒ 15x – 40 + y = 15x + 22.5}\\ \text{⇒ y = 62.5 kg}\end{array}$

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