HP 20b Consultant Financial manual Two-Number Functions

Mathematical Calculations

function, and continue calculating with your original operation without losing your work.

Two-Number Functions

Apart from +-*/, the three additional two-number functions accessible on the keyboard are:

Y x

nCr

nPr

Y x is the power function; nCr stands for the number of combinations of elements, r, among n, and nPr stands for the number of permutations of elements, r, among n.

nCr=n!/(r!(n-r)!)

nPr=n!/(n-r)!

Perform calculations with these functions in the same way you would perform calculations with +-/and *, but press :to access the

secondary function key. For example, to calculate 15 3 :

1.Press 15.

2.Press :h.

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