There are 15 small balls in black, white and red, which are mixed and put in the bag, from which several balls can be found? Write out the answer process that accords with the thinking level of primary school students

There are 15 small balls in black, white and red, which are mixed and put in the bag, from which several balls can be found? Write out the answer process that accords with the thinking level of primary school students

In order to ensure that the six balls are of the same color, we must consider the worst case, that is, when we touch the most but there are no six balls of the same color, that is, five balls of each color are touched. A total of 3 * 5 = 15 balls. In this case, as long as we touch any ball, there will be six balls of the same color, so at least 16 balls can ensure that the six balls of the same color