(a) Find Rohit's monthly salary. Solution \[ \begin{align*} \text{Let total salary of Rohit} & = x \\ \\ \text{Donation to NGO} & = \frac{1}{5} \text{ of } x \implies \frac{x}{5} \\ \\ \text{Spent on food} & = \frac{1}{4} \text{ of } x \implies \frac{x}{4} \\ \\ \text{Spent on rent} & = \frac{1}{3} \text{ of } x \implies \frac{x}{3} \\ \\ \text{Spent on other expenses} & = \frac{1}{15} \text{ of } x \implies \frac{x}{15} \\ \\ \text{Remaining salary} & = Rs \, 9000 \\ \\ \text{Total salary - Total expenses} & = 9000 \\ \\ x - \left( \frac{x}{5} + \frac{x}{4} + \frac{x}{4} + \frac{x}{5}\right) & = 9000 \\ \\ \frac{x}{1} - \left( \frac{12x + 15x + 20x + 4x}{60}\right) & = 9000 \\ \\ \frac{x}{1} - \frac{51x}{60} & = 9000 \\ \\ \frac{60x - 51x}{60} & = 9000 \\ \\ \frac{9x}{60} & = 9000 \\ \\ x & = 9000 \div \frac{9}{60} \\ \\ x & = \cancelto{1000}{9000} \times \frac{60}{\cancelto{1}{9}} \\ \\ x & = 60000 \\ \\ \end{align*} \] Answer Rohit's monthly salary = Rs 60,000 (b) What values of Rohit are depicted here? Answer Sensitivity towards girls education and kindness. (c) Why is the education, specially for girls, important? Answer For overall development of girls themselves and society.Rohit donated \( \frac{1}{5} \) of his montly income to an Non-Government Organisation (NGO) worknig for the education of the girl child, spent \( \frac{1}{4} \) of his salary on food, \( \frac{1}{3} \) on rent and \( \frac{1}{15} \) on other expenses. He is left with Rs 9000.