If two successive discount are 10% and 15%, then the single equivalent rate of discount is:

Correct option is D

Given: 

-10%

-15%

Formula Used: 

Successive  Discount = $$X+Y - \frac{XY}{100}$$ 

Solution: 

= $$(10)+(15)- \frac{(10)\times(15)}{100}$$​ 

= $$10+ 15-\frac{(1)\times(15)}{10}$$ 

= $$25 -1.5$$ 

= $$23.5 \%$$​​