lemonjelly 0 #1 December 17, 2004 Being a left hander, The creative side of my brain is prominent.. This is doing my nut in! Problem: I have 14 selections to make, i can enter 1, 2 or 3 I know for a fact that 6 of them will be 1 how many different permutations are there to cover all eventualities?? Oh, And I've just found out that I'm clean out of potatoes************************************************* RED LIGHTS & OFF LANDINGS ARE JUST MY THANG http://www.redlightrob.co.uk Quote Share this post Link to post Share on other sites
CrazyIvan 0 #2 December 17, 2004 24__________________________________________ Blue Skies and May the Force be with you. Quote Share this post Link to post Share on other sites
lemonjelly 0 #3 December 17, 2004 are you sure?************************************************* RED LIGHTS & OFF LANDINGS ARE JUST MY THANG http://www.redlightrob.co.uk Quote Share this post Link to post Share on other sites
lemonjelly 0 #4 December 17, 2004 That answer was as good as a repost************************************************* RED LIGHTS & OFF LANDINGS ARE JUST MY THANG http://www.redlightrob.co.uk Quote Share this post Link to post Share on other sites
lemonjelly 0 #5 December 17, 2004 how many statisticians does it take to change a lightbulb?************************************************* RED LIGHTS & OFF LANDINGS ARE JUST MY THANG http://www.redlightrob.co.uk Quote Share this post Link to post Share on other sites
katzurki 0 #6 December 17, 2004 14 selections, 6 of which are fixed. That leaves 8 variable. Each can be 1, or 2, or 3 -- three total. Then it's 3^8 = 6561 That is, unless you want to count the order in which you make these selections, in which case the number of the permutations increases significantly. Quote Share this post Link to post Share on other sites
Lostinspace 0 #7 December 18, 2004 Permutations of where the 1 can sit: n_t=total slots=14 n_1=number of 1’s=6 # of permutaions= (n_t)!/[(n_1)!*(n_t-n_1)!] Number of why the the 2’s and 3;s can sit in their slots: 2^8 So you number of permutations is: (2^8)* (n_t)!/[(n_1)!*(n_t-n_1)!] (2^8)* (14)!/[(6)!*(8)!]=768,768 768,768 I may not be right. That would be my final answer. That will be a dollar please. Now if this were a game, and I had a 50 percent chance of being correct; but I had to pay you every time I tried to school you, but when I finally did school you, you would pay me 2^n, where n is the number of tries I have had and I quit the game when I succeed, how much should you charge me for this game to be fair? Quote Share this post Link to post Share on other sites