Part I-
There are 1000 students in a high school. Among the 1000 students, 800 students have a laptop, and 300 students have a tablet. 150 students have both devices.
What is the probability that a randomly selected student has neither device?
What is the probability that a randomly selected student has a laptop, given that he/she has a tablet?
Let event A be the selected student having a laptop, and event B be the selected student having a tablet. Are A and B independent events? Why or why not?
Part II-
A combination lock uses three distinctive numbers between 0 and 49 inclusive. How many different ways can a sequence of three numbers be selected?