1. is 3, because knowing that you draw 16 red out of 48 draws total, you will divide 48 by 16 to figure out how much you really have in the bag.
2. So you'll add up all your draws so you have your total draws like the last equation so it'll be 12+5+18+15 getting 50. After you've gotten your total, you will combine both numbers getting 18/50, but seeing that its not fully factored, you'll divide both numbers by the highest possible, but still able to come out as a solid number. so you'll divide both numbers by 2, getting your answer 9/25.
