Which of the following represents the sample space for flipping a coin?

What is the probability of not obtaining a red card when a card is drawn from a standard 52-card deck that has been properly shuffled?

In a bag of 10 marbles, 4 are red, 3 are blue, and 3 are green. If you draw one marble, replace it, and then draw another, what is the probability of drawing a red marble both times?

In a class of 30 students, 18 are taking math and 12 are taking science. If 8 students are taking both subjects, what is the probability that a randomly selected student is taking either math or science?

A miniature Ferris wheel has twelve seats equidistant with one another along the wheel's circumference and has a shaft that points toward the north. At any given time after being spun, this object is designed so that a shaft always points to any of the twelve seats with a fair probability. These seats are labeled "A" to "L". Find the probability that the shaft points toward a seat labeled by a vowel letter or a letter from "A" through "F".