10. (a) Consider the digits 9, 8, 7, 6, 5, 4, 3, 2, 1 and 0. Find how many five-digit numbers
are possible if the digits are to be in: (i) descending order, (ii) ascending order.
15. From a standard deck of 52 playing cards, find how many five-card hands can be dealt:
(e) consisting of three...