Explanation:

To find the original price of the shirt, we backtrack the successive discounts:

- Let the original price be \( X \).

- First discount: 25% off, so the price becomes 75% of the original price: \( 0.75X \).

- Second discount: 10% off on the discounted price, making the price 90% of the already discounted price: \( 0.9 \times 0.75X \).

- Sold for Rs480, so: \( 0.9 \times 0.75X = 480 \).

Solving for \( X \):

$$ 0.675X = 480 $$

$$ X = \frac{480}{0.675} \approx 711.11 $$

- Option 1: Rs723

Too high compared to the calculated Rs711.11.

- Option 2: Rs720

Still higher than Rs711.11.

- Option 3: Rs711

This is closest to the calculated value.

- Option 4: Rs708

Slightly lower than the calculated value.

Correct Answer: Option 3 - Rs711