Among the following propositions, the serial number of the correct proposition is. (1) flip two coins, you can see ". ...

When you toss two coins, there are three kinds: "two heads", "two tails" and "one head and one tail", in which the probability of "two heads" and "two tails" is 0, and the probability of "one head and one tail" is 1 incorrect;

Touch a ball from the bag, the possibility is red, the possibility is black and the possibility is white. The possibility of each color is different, and ② is correct;

Choose a representative from three boys and m-girls respectively, then the probability of boys being elected is, the probability of girls being elected is, the two possibilities are different, ③ incorrect;

Five people draw lots, A draws first, B draws later, and the probability of A drawing first is that B draws later and B draws later, that is, A does not draw, so its probability is that the probability of two draws is equal, and ④ is correct;

There are 40 boys and 20 girls in a class. If 12 students are stratified sampling, they need to be selected from boys and girls. Therefore, the possibility of boys being drawn is: the possibility of girls being drawn is; The possibility of girls being drawn is; Girls are more likely to be drawn; ⑤ Incorrect.