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| COMBINATIONS
AND PERMUTATIONS |
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A permutation of r elements
selected from a set S with n elements is an ordered arrangement
of those r elements selected without repetition.
nPr is the symbol used
to denote the number of permutations of r elements
selected from a set of n elements and
Here’s a permutation
problem: In how many ways can you select and read three
books from a shelf of eight books? (Note:
The key here is to read the books; which means you must
choose a book to read first,
2nd and 3rd, thus order counts.)
Click the Solution button
to see the answer. |
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