At a certain college, there were 600 science majors, 300 engineering majors, and 800 business majors. if one student was selected at random, the probability that the student is an engineering major is

You're locked out of your house. the only open window is on the second floor, 25 feet above the ground. there are bushes along the edge of the house, so you will need to place the ladder 10 feet from the house. what length ladder do you need to reach the window?