Mathematics, 02.04.2021 09:00, XOsam

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. Let N be the event that a randomly selected senior regularly wears a necklace and R be the event that a randomly selected senior regularly wears a ring.

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