### 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
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### Solution(By Apex Team)

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

## Related Questions On Average

A. 20
B. 21
C. 28
D. 32
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A. 18
B. 20
C. 24
D. 30
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A. 10 years
B. 10.5 years
C. 11 years
D. 12 years
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### 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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