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virtus
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Eight keys are placed on a key ring. How many different arrangements are possible if they are all different
 2 years ago
 2 years ago
virtus Group Title
Eight keys are placed on a key ring. How many different arrangements are possible if they are all different
 2 years ago
 2 years ago

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IllasMcKay Group TitleBest ResponseYou've already chosen the best response.0
Pairs or ....
 2 years ago

virtus Group TitleBest ResponseYou've already chosen the best response.0
what do you mean?
 2 years ago

IllasMcKay Group TitleBest ResponseYou've already chosen the best response.0
just wait my Friend
 2 years ago

sauravshakya Group TitleBest ResponseYou've already chosen the best response.0
8 factorial
 2 years ago

IllasMcKay Group TitleBest ResponseYou've already chosen the best response.0
dw:1342271877443:dw then 8 factorial as @sauravshakya
 2 years ago

virtus Group TitleBest ResponseYou've already chosen the best response.0
my solution book says the answer is 7!/2
 2 years ago

virtus Group TitleBest ResponseYou've already chosen the best response.0
@myko where does the 2 come from?
 2 years ago

myko Group TitleBest ResponseYou've already chosen the best response.3
dw:1342272266287:dw dw:1342272292346:dw is the same in this case
 2 years ago

myko Group TitleBest ResponseYou've already chosen the best response.3
no, you right. The right answer is 7!/2
 2 years ago

virtus Group TitleBest ResponseYou've already chosen the best response.0
yes i thought so, because it is (n1)!
 2 years ago

mukushla Group TitleBest ResponseYou've already chosen the best response.0
The total number of n objects, arranged in a circle which can be flipped over without making a new arrangement is: \[\frac{(n1)!}{2}\]
 2 years ago

virtus Group TitleBest ResponseYou've already chosen the best response.0
thank you@mukushla
 2 years ago

myko Group TitleBest ResponseYou've already chosen the best response.3
it is (n1)! and not n!, because there is no reference point. The reference point is the first key you put, so it's has to be rested from the total number of left posibilties. It is later devided by 2, becouse the ring can flip, so symetric permutations become the same
 2 years ago

virtus Group TitleBest ResponseYou've already chosen the best response.0
btw @myko does this rule apply to sitting in a circle arrangements
 2 years ago
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