A bag contains 30 red tiles 15 green tiles and 5 yellow tiles one tile is drawn and then replaced then a second tile is drawn what is the probability that the first tile is yellow and tbe second tile green

30 red, 15 green, 5 yellow ... total of 50

P (1st tile is yellow) = 5/50 which reduces to 1/10

replaced

P (2nd tile is green) = 15/50 which reduces to 3/10

P (both events happening) = 1/10 * 3/10 = 3/100 or 0.03 or 3% <==