At a school event, 19 tickets cost Rs 3310 in total. Adult tickets cost Rs 270 and child tickets Rs 130. How many child tickets were sold?

Question: At a school event, 19 tickets cost Rs 3310 in total. Adult tickets cost Rs 270 and child tickets Rs 130. How many child tickets were sold?

1. 13
2. 14
3. 12
4. 15

Correct Answer: A — 13

Explanation: Let child tickets be x; adult tickets are total count − x, then equate revenue.
Solve 270(19 − x) + 130x = 3310; child tickets x = 13.