Explanation:

To calculate the equivalent single discount for two successive discounts of 9% and 17%, we use the formula for successive discounts:

- Equivalent discount = 9 + 17 - (9 * 17) / 100.

- This becomes 26 - 1.53 = 24.47%.

Here's how each option checks out:

- Option 1 (27.53%): Incorrect. This assumes too much of a compounded reduction.

- Option 2 (26.47%): Incorrect. Slightly off from the actual calculation.

- Option 3 (26.00%): Incorrect. Not reflecting the compound nature.

- Option 4 (24.47%): Correct. Perfect match with the calculated equivalent discount.

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