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nPr

On a Casio calculator you can calculate permutations

PROB nPr
OPTN F6 F3 F2

or via the catalog as

CATALOG  P INPUT
SHIFT 4  P   F1

The description stands for 'n Permutation r'.

 


Example 1

To determine how many 4-digit values can be produced using the numbers 1 through 7. Numbers can not be duplicated within the same 4-digit value (1234 is allowed, but 1123 is not)

nPr
 7  7P  4  EXE 7P4
840

 


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