Say I take six colors from an infinite pool of red, green and blue colors and I want to figure out how many orders there are for a certain amount of the colors. e.g. with 3 red, 2 green and 1 blue you might pick them in these orders: RRRGB, RRGRB, etc. and I want to know the total number of orders of those colors that exist. How do I do this? I have very little knowledge of math so please try to make it understandable, or just give me a formula if that's too difficult.