You earn $3 an hour as a waitress. after working 3 hours, you earn $12, $5, and $7 in tips. how much money did you earn in total? explain how you found your answer.

Fracisco's game involves 3 green, 2 yellow, 4 red, and 3 black marbles. if he randomly draws three marbles from the bag, without replacement, what is the probability that he will draw yellow, and then red, and then black? a)1/192 b)1/72 c)3/220 d)1/55