Eight friends went to aa hockey game. The prine of admission per person was was $x four of the friends paid an extra $6 each for a player guide book, write and simlify an expression that represents the total cost,

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?