A mobile phone was sold for ₹31,500 after giving two successive discounts of 30% and 10%, respectively. What was the marked price of the mobile?

Given,

Selling Price of the mobile phone = $$₹31,500$$

Let the Marked Price of the mobile phone = $$\text{M.P}$$

Price after 30% discount = $$\frac{70}{100}\times \text{M.P}$$

Selling Price after 10% discount = $$\frac{90}{100}\times\frac{70}{100}\times \text{M.P}$$

$$=$$>  $$\frac{90}{100}\times\frac{70}{100}\times \text{M.P}=31500$$

$$=$$>  $$\text{M.P}=₹50000$$

$$\therefore\ $$Marked Price of the mobile phone = $$₹50,000$$

Hence, the correct answer is Option B