3 days! School been **** since monday, had a bit of lovely maths then but none since. I'm habing withdrawal symptomsOriginally Posted by Phage
And yes, it's 1000 solutions or 720, depending on which way you look at it.
Edit: Whut? Why is the word "shut" starred out?
Edit: Oh I see what happened there
2 hours 11 minutes for me...
No nostalgia needed...
Post Counts and Other Rewards, Rules, Folding@Home, Fans: Push vs Pull vs Push-Pull, Corsair PSU OEMs.
TAKTAK.co.uk
Terbinator (09-12-2010)
That'll teach me to post without trying the common sense method
(\___/) (\___/) (\___/) (\___/) (\___/) (\___/) (\___/)
(='.'=) (='.'=) (='.'=) (='.'=) (='.'=) (='.'=) (='.'=)
(")_(") (")_(") (")_(") (")_(") (")_(") (")_(") (")_(")
This is bunny and friends. He is fed up waiting for everyone to help him out, and decided to help himself instead!
Enjoy maths while you can.
College is just beer, pizzas and all-niter assignments the day before they're due. It sounds a lot better on paper than it actually is trust me on this. Come to think of it I don't even like beer or assignments...
If they are different, then the calculation is 10!-7!In that case, it would be 999 (1000 is a four digit number).
However, the OP stated that the 3 numbers are different - so you couldn't have (for example): 111, 112, 099, 444, 696 etc...).
! is the symbol for factorial IIRC. It's best illustrated with an example.
5! is 5*4*3*2*1
Disclaimer: it's been 14 years since I did maths and I have never used this kind of Maths since so I may be way off!
"In a perfect world... spammers would get caught, go to jail, and share a cell with many men who have enlarged their penises, taken Viagra and are looking for a new relationship."
The calculation is most certainly not 10!-7!, it's simply 10^3 as scaryjim has already told us.
To find the number of combinations you take the number of possible figures (10 in this case) and then the number of positions (3 in this case), let them be n and k respectively then do n^k. It gets more complex if you want different numbers and that's when you need to use common sense like snooty did and do 10*9*8 = 720.
Indeed, it's not 10! - 7!, it's 10! / 7!. Which works out as 10*9*8, as nibbler says.
I learned everything I know about probabilities and combination from a GCSE Maths project on Poker: so, not very much at all then
My mistake - it was 10!/7!Indeed, it's not 10! - 7!, it's 10! / 7!. Which works out as 10*9*8, as nibbler says.
I learned everything I know about probabilities and combination from a GCSE Maths project on Poker: so, not very much at all then
"In a perfect world... spammers would get caught, go to jail, and share a cell with many men who have enlarged their penises, taken Viagra and are looking for a new relationship."
There are currently 1 users browsing this thread. (0 members and 1 guests)
Posting Permissions
LinkBack URL
About LinkBacks
Reply With Quote