###
**The average weight of 20 students in a class is increased by 0.75 kg when one student of 35 kg replaced by a new student. Weight of the new student (in kg) is :**

A. 35
B. 40
C. 45
D. 50
**Answer: Option D**

## Show Answer

Solution(By Apex Team)

Let the weight of the new student = x kg
According to the question,
$\begin{array}{l}\left(\Large\frac{x-35}{20}\right)=0.75\\
\Rightarrow x-35=15\\
\Rightarrow x=50\end{array}$

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