The cost price of two books is in the ratio of 2 ∶ 3. Marked price of books is 30% and 40% more than the cost price of books respectively. Each book is given after two successive discounts of 20%. The overall loss percentage incurred on the sale of the two books is ________
1
13.40%
2
11.84%
3
11.50%
4
12.96%