math ?

[hellY06]

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any one can help me distinguish bt. when to use n!/ (n-r)! and n!/r(n-r)!

thanx👍 any help is appreicated

 

[Djapprentice]

any one can help me distinguish bt. when to use n!/ (n-r)! and n!/r(n-r)!

thanx👍 any help is appreicated

Hey Helly, how's the struggle going at your end? For the first one, its for permutations, used particular for ARRANGMENTS, when order matters, like positioning people in line, & the latter, is for combinations, when order doesn't matter, the common example for the second one is committiee formation. Hope this helps. Let me know if you still need any further clarifications.
Good luck studying & on Game day, which for me is only a week away!

 

[hellY06]

any one can help me distinguish bt. when to use n!/ (n-r)! and n!/r(n-r)!

thanx👍 any help is appreicated

Hey i m doing okkk i think ,,,,,mine is in almost 50 hours!!!!
but i m still confused about this thing 🙁

or if u have destroyer?!?!?,,,,well look at # 27) use: n!/r!(n-r)!
# 86+87) use: n!/(n-r)!

maybe from these exampls u can help me explain little better......how s ur stydyin coming along??

 

[tsarasua]

howabout those darn work/rate problems where there is one group of people working in a set amount of time and then they amp up their people power and you are suppose to find out how long it will take them to finish the same job or something to that extent.
anyone know any formulas or set framework on how you are suppose to solve this?