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Eyad
 3 years ago
~I Need Someone Who Understand Permutations And Combinations *Very well* ..~
Eyad
 3 years ago
~I Need Someone Who Understand Permutations And Combinations *Very well* ..~

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CliffSedge
 3 years ago
Best ResponseYou've already chosen the best response.1For what? I don't know if I qualify as *very well* but I know how they work. You got something really complicated?

Eyad
 3 years ago
Best ResponseYou've already chosen the best response.0@CliffSedge :They are not very Complicated but i want someone to help me through some questions ....

CliffSedge
 3 years ago
Best ResponseYou've already chosen the best response.1I'll at least take a look at one. I need to go in few minutes, though, but hopefully I can at least point you in the right direction.

Eyad
 3 years ago
Best ResponseYou've already chosen the best response.0hmmm. As a start : IF : \[\Large C^{n}_{8} \times C^{n}_{6} \ge C^{n}_{7} \times C^{n}_{5}\] Prove That : \[\Large n \ge13\] _

CliffSedge
 3 years ago
Best ResponseYou've already chosen the best response.1Ok, so you know the combinations formula? \[nCk=\frac{n!}{k!(nk)!}\]

CliffSedge
 3 years ago
Best ResponseYou've already chosen the best response.1Ok, and as a start, n≥k so it has to be at least 8, just given the values of k.

CliffSedge
 3 years ago
Best ResponseYou've already chosen the best response.1It might also help to look at a simpler case using slightly smaller numbers to see how the factorials simplify. e.g. Show that 6C5 X 6C3 ≥ 6C4 X 6C2. That may give you some further insight.

CliffSedge
 3 years ago
Best ResponseYou've already chosen the best response.1Sorry, should have said "e.g. Show if ... ≥ ..." Because it might not.

Eyad
 3 years ago
Best ResponseYou've already chosen the best response.0To be honest thats not giving me at least a small hint .. I was looking for a short way to end this question .. Anyway Ty for your help :)

CliffSedge
 3 years ago
Best ResponseYou've already chosen the best response.1If you play around with it a little bit, you'll see that the difference between n and k is important for the ultimate size of nCk  maybe also think of Pascal's Triangle . . .

CliffSedge
 3 years ago
Best ResponseYou've already chosen the best response.1Yeah, sorry, I'm feeling rushed, 'cause I need to go take care of some other matters, so the shortcut isn't coming to me at the moment. Good luck!

Eyad
 3 years ago
Best ResponseYou've already chosen the best response.0nvm ,i will find a way for it :) Ty again :)
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