Abag contains 10 red marbles, 15 yellow marbles, 5 green marbles, and 20 blue marbles. two marbles are drawn from the bag.

which expression represents the probability that one of the marbles is red and the other is blue?

Zed is making a centerpiece for his dining room table by putting sand in a cube-shaped vase. the vase is 0.25 meters in length, width, and height. he bought 25 kg of sand. assume the density of dry sand is 1,602 kgm3. what is the volume of the sand that zed purchased? the volume of the sand is approximately m3. enter your answer as the number that correctly fills in the blank in the previous sentence. if necessary, round your answer to six decimal places, like so: 42.536475