The principle of east high school wants to buy a new cover for the sand pit they used for a long time - use to long jump competition he measured the sand pit and found the length is 29.2 feet and the width 9.8 feet what would be the area of the new cover be

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?