Re: HSC 2015 3U Marathon
help me pls with this question pls pls
Q. 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:
a) i) ascending order
a) ii) descending order
b) Why do these 2 questions involve unordered selections...