Permutations and Combinations

The permutation of n things taken r at a time, nPr, is calculated as follows. For 5P3 enter

5


and press three times to select PRB. Then, select nPr by pressing . Enter the value of r, which is 3 and press .

The combination of n things taken r at a time, nCr, is calculated as follows. For 6C4 enter

6


and press three times to select PRB. Then, select nCr by pressing . Enter the value of r, which is 4 and press .