Who this is for

Students and professionals solving everyday math problems quickly.

probability.heading

probability.description

How we calculate this - methodology, formulas & sources

nCr (combination)

120

n (total items)

0170

r (chosen items)

0170

C(10,3)

120

order doesn't matter

P(10,3)

720

order matters

n! (factorial)

3,628,800

nPr (permutation)

720

nCr (combination)

120

How we calculate this - methodology, formulas & sources