Question

6 boys and 6 girls go to an exhibition and the cost of a ticket is Rs 10. Each girl has a ten rupee note while each boy has twenty rupee note they stand in a queve at the counter and the cashier does not have any money in the beginning , then the number of ways of arranging the boys and girls ,so that no one waits for a change is

Answer 1

Answer:

132 (720 squares)