Let Kamal's income be $8x$, Amal's income be $6x$, and Vimal's income be $5x$.
- The total income in September is $8x + 6x + 5x = 19x$.
In September, Kamal pays 15%, Amal pays 12%, and Vimal pays 18% of their respective incomes.
- Kamal's contribution: $15\% \times 8x = 1.2x$.
- Amal's contribution: $12\% \times 6x = 0.72x$.
- Vimal's contribution: $18\% \times 5x = 0.9x$.
The total rent in September is:
$1.2x + 0.72x + 0.9x = 2.82x$.
In October, their incomes increase by 10%, 12%, and 15%, respectively.
- Kamal's new income: $8x \times 1.10 = 8.8x$.
- Amal's new income: $6x \times 1.12 = 6.72x$.
- Vimal's new income: $5x \times 1.15 = 5.75x$.
The total income in October is:
$8.8x + 6.72x + 5.75x = 21.27x$.
The percentage of their total October income paid as rent is:
$\frac{2.82x}{21.27x} \times 100 = 13.26\%$.
| Mutual fund A | Mutual fund B | Mutual fund C | |
| Person 1 | ₹10,000 | ₹20,000 | ₹20,000 |
| Person 2 | ₹20,000 | ₹15,000 | ₹15,000 |
List I | List II | ||
| A. | Duplicate of ratio 2: 7 | I. | 25:30 |
| B. | Compound ratio of 2: 7, 5:3 and 4:7 | II. | 4:49 |
| C. | Ratio of 2: 7 is same as | III. | 40:147 |
| D. | Ratio of 5: 6 is same as | IV. | 4:14 |