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Online ProgramThe teacher is giving away pencils in class one day. She has a box that contains 12 red pencils, 12 blue pencils, 12 green pencils, and 12 yellow pencils. The teacher tells the students to take a pencil without looking. The first three students pick a red pencil, a blue pencil, and a yellow pencil. What is the probability that the fourth student will pick a green pencil?