While purchasing one item costing Rs. 400, I had to pay the sales tax at 7% and on another costing Rs. 6400, the sales tax was 9%. What percent of the sales tax I had to pay, taking the two items together on an average ?	Choose the correct choice from the following answers.
A) 8 + 15/17
B) 8 + 15/18
C) 8 + 15/12
D) 8 + 15/11
E) 8 + 15/110
Explanation:   Total sales tax paid = 7% of Rs, 400 + 9% of Rs. 6400   == Rs. (28 + 576) = Rs. 604.   Total cost of the items = Rs. (400 + 6400) = Rs. 6800.   Required percentage =% =%.   8 + 15/17nswer: 8 + 15/17) 8 + 15/17
<result>A</result>
While purchasing one item costing Rs. 400, I had to pay the sales tax at 7% and on another costing Rs. 6400, the sales tax was 9%. What percent of the sales tax I had to pay, taking the two items together on an average ?