Bryan was told to expect to have 10 interviews with different companies before being offered a job. Over a period of weeks, he has 30 job interviews. How many job offers should he expect to receive?

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?