What is the single per cent discount equivalent to two successive discounts of 18.5% and 11.5%?

Correct option is C

Given:

Two successive discounts:

First = 18.5%

Second = 11.5%

Formula Used:

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

Solution: 

Here, 

X = 18.5 and Y = 11.5 

Now, 

​$$= 18.5 + 11.5 - \frac{18.5 \times 11.5}{100} \\ \ \\= 30 - \frac{212.75}{100} \\ \ \\= 30 - 2.1275 = 27.8725\%$$​​