A shipment contains 10 igneous, 8 sedimentary, and 8 metamorphic rocks. If 5 rocks are selected at random, find the probability that exactly 3 are sedimentary. The probability that exactly 3 of the rocks are sedimentary is (Round to four decimal places as needed.) A pair of dice is rolled. Find the probability of rolling a) a sum not more than 11, b) a sum not less than 8, c) a sum between 6 and 10 (exclusive). a) The probability of rolling a sum not more than 11 is (Type an integer or a simplified fraction.) A marble is drawn from a box containing 3 yellow, 5 white, and 15 blue marbles. Find the odds in favor of drawing the following. (a) A yellow marble (b) A blue marble (c) A white marble (a) In reduced form, the odds in favor of drawing a yellow marble are (Simplify your answers.) to