Hi guys. So search results say that there are 4.3 Billion of them. What i'd like to know is how did they arrive at that number? How does one actually mathematically calculate the total number? Thanks!
EDIT - Can someone explain in terms of permutation/combination? I'm pretty sure it has something to do with P/C (i remember faint ideas of P/C from school). My math is weak sorry :(
No comments:
Post a Comment