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The combination formula is usually written as nCr representing the number of combinations of r objects at a time taken from n.
nCr = n!/[r!*(n-r)!]
The permutation formula is usually written as nPr representing the number of permutations of r objects at a time taken from n.
nPr = n!/r!
Where n! [n factorial] is 1*2*3*....*(n-1)*n
What else can I help you with?
How maths terms combination and permutation apply in chemistry?
The Maths terms combination and permutation apply in chemistry when making the expected industrial calculation.
Give an example of a permutation and combination?
If there is a group of 3 coloured balls, then any groups of 2 balls selected from it will be considered as a combination, whereas the different arrangements of every combination will be considered as a permutation
Why are combination locks so called when they are in fact permutation locks?
They are called combination locks because that is the general, conventional term used. Trying to call them permutation locks is mixing different areas of usage together and that is not valid.
Is math debatable?
yes math is debatable.... ex. combination and permutation are very arguable
How permutation differ from combination?
In permutations the order of the elements does matter. In combinations it does not.So, the permutations 1,2,3 and 3,1,2 are not the same. But they are the same combination.
