The marked price of a toy was ₹ 1800. Two successive discounts of 20% and 15% were offered on it during a sale. What was the selling price of the toy?

Given parameters:
* Marked Price ($\text{MP}$) $=\text{₹ }1800$
* First discount ($d_1$) $=20\%$
* Second discount ($d_2$) $=15\%$

The net selling price ($\text{SP}$) can be calculated by applying both fractional deductions directly:

$$\text{SP}=\text{MP}\times \left(1-\frac{d_1}{100}\right)\times \left(1-\frac{d_2}{100}\right)$$

$$\text{SP}=1800\times \left(1-\frac{20}{100}\right)\times \left(1-\frac{15}{100}\right)$$

$$\text{SP}=1800\times \frac{80}{100}\times \frac{85}{100}$$

$$\text{SP}=1800\times 0.8\times 0.85$$

$$\text{SP}=1440\times 0.85=1224$$

Alternatively, find the equivalent single discount:

$$d_{\text{net}}=20+15-\frac{20\times 15}{100}=35-3=32\%$$

$$\text{Total Discount Value}=32\%\text{ of }1800=\frac{32}{100}\times 1800=576$$

$$\text{SP}=1800-576=1224$$

Therefore, the selling price of the toy was $\text{₹ }1224$.