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The formula to calculate r-permutation is given by n! r! (n r)! - n! (n r)! - n! r! n! r! (r n)!
The formula to calculate r-permutation is given by n! r! (n r)! - n! (n r)! - n! r! n! r! (r n)!
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Cambridge International AS & A Level Further Mathematics Coursebook
Authors: Lee Mckelvey, Martin Crozier
1st Edition
1108403379, 978-1108403375
