Suppose an opaque jar contains 3 red marbles and 10 green marbles. The following exercise refers to the experiment of picking tw
o marbles from the jar without replacing the first one. What is the probability of getting a green marble and a red marble? (Enter your probability as a fraction. Hint: How is this exercise different from finding the probability of getting a green marble first and a red marble second?)
Planes X and Y are perpendicular to each other Points A, E, F, and G are points only in plane X Points R and S are points in both planes X and Y Lines EA and FG are parallel
The lines which could be perpendicular to RS are EA and FG.