You have 10 marbles. 4 of them are red and 6 of them are blue. how many different and unique ways can you sort these marbles and lay them out in a line?
for example: = 4 red first then 6 blue and is one way they can be sorted. b = 1 blue, 4 red, and 5 blue is another way they can be sorted. give you answer as a whole number.