There are two ways to draw pairs. One is to draw the yellow pair, and the probability is calculated as follows: (2/4)*( 1/3)= 1/6, and the other is to draw the red pair. Similarly, the probability is 1/6, and the probability of picking the right pair is the sum of the two, that is, (1/6. You can do the same. There are 4*3= 12 extraction methods, and a pair has 4 extraction methods, so each pair has 4 extraction methods, so it is 1/3. Although your answer is accurate, the method is wrong. Because the total extraction method is not six but 12, because the extraction is sequential, even if you extract two colors, but the order is different, it is also two situations rather than one situation. In fact, the simplest algorithm is the second one, the total extraction method is 12, and the calculation is as follows: there are four kinds of extraction first, and there are three kinds of extraction first, because by the same token, Huang is right.

The key is that the colors are all the same, but the order of painting is different. It's not a kind. In fact, this probability problem, no matter how complicated, will be easy to calculate. This problem is relatively simple and can be worked out without learning to arrange and combine.

The biggest difference between permutation and combination is that permutation considers order. For example, if you draw two red ones, there are two arrangements, because the two can be drawn in different orders, but if you combine them, as long as the result is the same, no matter which one you take first, the result is a pair of red ones, so it is a situation.

Sorry, these two gloves are lined up. How many arrangements are there? How many combinations are there? It's simple. You can do the math.