At its peak, an online shopping site was selling about 420420 items per second. At this rate, how many items would it sell in 3030 minutes (1,8001,800 seconds)?

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