There are five red balls and five white balls in the box. Now the probability of getting two red balls and two white balls is as follows. The questions are as follows

In the third way, the probability of drawing a red ball or a white ball every time is 1/2. So no matter what color combination you get, the probability is the same. Every four times, there are 2x2x2 =16 color combinations, two of which are red, two are black, and there are 16-2-4.