###
**In an examination average marks obtained by the girls of a class is 85 and the average marks obtained by the boys of the same class is 87. If the girls and boys are in the ratio 4 : 5, average marks of the whole class (approx.) is closest to :
**

A. 86.5
B. 85.9
C. 86.4
D. 86.1
**Answer: Option D**

## Show Answer

Solution(By Apex Team)

$\begin{array}{l}\text{ Average of whole class }\\
=\Large\frac{85\times4+87\times5}{5+4}\\
=\Large\frac{340+435}{9}\\
=\Large\frac{775}{9}\\
=86.1\end{array}$

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