A kid has 10 white marbles numbered 1 to 10, 6 orange marbles numbered 1 to 6, and 6 green marbles numbered 1 to 6.

-The kid sets his marble in a straight line in how many different ways can he arrange them?

-The kid randomly rearrange them in a line. What is the probability that the first 10 marbles are white, followed by 6 orange ones and 6 green ones.

- Again he rearrange them randomly, what is the probability that the marbles are set in alternating colors?