There was a total of $548 dollars collected for tickets to the school play. the adult ticket cost $6 and the student ticket cost $4. if 12 more student tickets were sold than adult tickets, find the number of adult and student tickets sold.

Aclassroom is made up of 11 boys and 14 girls. the teacher has four main classroom responsibilities that she wants to hand out to four different students (one for each of the four students). if the teacher chooses 4 of the students at random, then what is the probability that the four students chosen to complete the responsibilities will be all boys?