SSC Sample Paper Mock Test-11 SSC CGL Tear-II Paper-1

A pen is listed for Rs. 12. A discount of 15 % is given on it. A second discount is given bringing the price down to Rs. 8.16. The rate of second discount is

A) 20%

B) 15%

C) 18%

D) 25%

Correct Answer: A

Solution :

Let the rate of second discount \[=x%\]

After 15% discount,

Price of pen\[=\frac{85}{100}\times 12\]= Rs. 10.20

Now, \[10.20-8.16\]= Rs. 2.04

It is second discount.

\[\therefore \] \[\frac{x}{100}\times 10.20=2.04\]

\[\Rightarrow \] \[x=\frac{2.04\times 100}{10.20}\]

\[\Rightarrow \] \[x=\frac{204}{10.20}\]

\[\Rightarrow \] \[x=20%\]