Explanation:

- Ravi spends 20% of his income on rent. He then spends 15% of the remaining amount on education.

- After these expenses, he further spends 30% of the current remainder on clothes.

- He saves Rs 9520 from whatever is left.

- We need to find his total income based on these savings.

Let's calculate:

1. Let his income be Rs 'X'.

2. After house rent, he has 80% of his income left: 0.8X.

3. After education, he has 85% of 0.8X left: 0.8X * 0.85 = 0.68X.

4. After spending on clothes, he has 70% of 0.68X left: 0.68X * 0.7 = 0.476X.

5. This remainder is his savings: 0.476X = Rs 9520.

6. Solving gives X = 9520 / 0.476 = Rs 20000.

Correct Answer: Option 3 - 20000