CTET Class I to V 2019 Dec Paper

Let total number of trees in the garden are n
Number of neem trees $=\frac{6}{\mathit{n}}$
Number of Ashoka trees $=\frac{2}{\mathit{n}}$ Number of Eucalyptus trees $=\mathit{n}=\frac{\mathit{n}}{6}-\frac{\mathit{n}}{2}=\frac{\mathit{n}}{3}$
According to the question,
$\frac{\mathit{n}}{6}=5$
$\Rightarrow \mathit{n}=5\times 6=30$
Number of Eucalyptus trees $=\frac{30}{3}=10$