In certain areas, such as probability or expanding a binomial expression, one needs to calculate the combination of n things taken k at a time, , denoted by a variety of notations, including

C(n,k) | nCr |

This item calculates the number of different ways that k objects can be selected from a set of n objects. For example,
in how may ways can we select 5 items from a set of 8 items. The answer is determined by calculating C(8,5).
The item **nCr(** is found in the MATH menu.

Press MATH to access the MATH menu,press to select 7:Probabaility,press to select 3:nCr,press to calculate C(8,5). We then observe that C(8,5) = 56. |