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 ?
Correct Answer: Option A
Total sales tax paid = 7% of Rs, 400 + 9% of Rs. 6400
=Rs. (7 \(\div\) 100) \(\times\) 400 + (9 \(\div\) 100) \(\times\) 6400 = Rs. (28 + 576) = Rs. 604.
Total cost of the items = Rs. (400 + 6400) = Rs. 6800.
Required percentage =(604 \(\div\) 6800 \(\times\) 100) % = \(8\frac{15}{17}\)%
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