Find the single equivalent discount for successive discounts of 12\%, 18\%, and 25\% on the marked price of a car.

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**Solution:**

1. Calculate the effective discount of the first two successive discounts (12\% and 18\%):

Use the formula for successive discounts:
   $$ d = d_1 + d_2 - \frac{d_1 	imes d_2}{100} $$

Substitute values:
   $$ d = 12 + 18 - \frac{12 	imes 18}{100} = 30 - 2.16 = 27.84\% $$

2. Now, calculate the single equivalent discount for the effective discount (27.84\%) and the third discount (25\%):

Again, apply the formula:
   $$ d = 27.84 + 25 - \frac{27.84 	imes 25}{100} $$
   $$ d = 52.84 - 6.96 = 45.88\% $$

**Answer:** The single equivalent discount for successive discounts of 12\%, 18\%, and 25\% is **45.88\%**.

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