100 Points + Brainliest

There are 500 students in a high school senior class. Of these 500 students, 300 regularly wear a necklace to school, 200 regularly wear a ring, and 125 regularly wear a necklace and a ring. Using this information, answer each of the following questions.
What is the probability that a senior wears a necklace?
What is the probability that a senior wears a ring?
What is the probability that a senior wears a necklace and a ring?
What is the probability that a senior wears a necklace or a ring?