To compute the number of permutations of n objects taken r at a time, use the nPr command located in the MATH PRB submenu. For example, let's find the number of permutations of 10 items taken 6 at a time. The variable n is the total number of items and r is the number of objects selected from the n items. So, we must use n = 10 and r = 6. Enter the value of n first, then the command, followed by the value of r.
The number of permutations of 6 items taken from 10 items is 151,200. |
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