Ticket for an adult is Rs 1600 and a child is Rs 600. 1 child goes free with two adults. If a group has 17 adults and 7 children what is the discount the group gets?

Cost price of adult ticket = Rs. 1600 and child ticket = Rs. 600

For 17 adults and 7 children, total cost = $$(17 \times 1600) + (7 \times 600)$$

= Rs. (27,200 + 4,200) = Rs. 31,400

If one child goes free with two adults, => 7 children will go with 14 adults, thus all the children will go for free.

Cost of 17 adults = $$17 \times 1600 = Rs. 27,200$$

Discount % = $$\frac{31400 - 27200}{31400} \times 100$$

= $$\frac{4200}{314} = 13.37\%$$

=> Ans - (A)