You spin a spinner that has 12 equal-sized sections numbered 1 to 12. What is the probability that you spin a 3 or a 5?
P(3 or 5) = 1/6
Susie had four kinds of cookies. She had 4 chocolate chip, 6 sugar cookies, 5 oatmeal cookies, and 3 Oreos. She, Susie, wants one of the Oreos and 3 of the chocolate chips. What is the probability that she will pick these cookies
P(Oreo, then chocolate chip) = 1/102
A jar contains 3 caramels, 7 mints, and 4 dark chocolates. What is the probability of selecting a dark chocolate or a caramel?
A jar contains 100 marbles, identical except that 30 are red, 20 black, 5 green and the rest white. If a marble is taken from the jar at random, what is the probability that the marble is white?