Ticket for an adult is Rs 2200 and a child is Rs 990. One child goes free with two adults. If a group has 23 adults and 11 children, what is the discount the group gets?

Cost price of adult ticket = Rs. 2200 and child ticket = Rs. 990

For 23 adults and 11 children, total cost = $$(23 \times 2200) + (11 \times 990)$$

= $$50,600 + 10,890$$ = Rs. $$61,490$$

If one child goes free with two adults, => 11 children will go with 22 adults, thus all the children will go for free.

Cost of 23 adults = $$23 \times 2200 = Rs. 50,600$$

Discount % = $$\frac{61490 - 50600}{61490} \times 100$$

= 17.71%

=> Ans - (A)