The amount of time home owners spend gardening is normally distributed with a mean of 3 hours per week and a standard deviation of 2 hours. If 5 random home owners are selected, what is the probability that the mean of those 5 homes is more than 6 hours?

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?