If Eli has a password of three numbers, if he uses the numbers 0-9, how many possible combinations are there?

If Warren has (apples) 4 Fijis, 6 Granny smiths, and 6 Honey Crisps, and takes two away at random without replacing the first one, what is the probability that he will pick:
(Fiji, Honey Crisp)

If

If Kit has 10 drawings, but can only enter 4 in a drawing for a free Xbox, how many ways can she enter her paintings?

If Warren goes to tutoring 3 days a week, and has 6 assignments, how many ways can he work on his assignments?

If Matt has (apples) 16 Fijis, 9 Granny smiths, and 10 Honey Crisps, and takes three away at random without replacing the first two, what is the probability that he will pick:
(Fiji, Fiji, Granny Smith)