Abag contains 2 white marbles and 7 purple marbles. two marbles are drawn at random. one marble is drawn and not replaced, then a second marble is drawn
a. what is the probability of selecting a purple marble and then a white marble?
b. what is the probability of selecting 2 white marbles?
c. is there a greater chance of selecting 2 white marbles in a row or 2 purple marbles in a row? show your work!

hallie is trying to win the grand prize on a game show. should she try her luck by spinning a wheel with 6 equal sections labeled from 1 to 6 and hope she gets a 5, or should she roll two number cubes and hope she gets the same number on both cubes. show your work?