How to do Combinations on the Ti 89 calculator. The Common Core related standard is, “Use

permutations and combinations to compute probabilities of compound events and solve problems.” Remember, the formula for Combinations is

n factorial divided by (n – r) factorial times r factorial. Where n is the total number of objects and

r is the number of those objects that you want to form a combination. The order of the

r objects does not matter. The answer is the number of combinations that you can make from

the number of r. Combination notation is also written as: little

n, capital C, and little r. n C r. Also known as n Choose r. Example. We have five different colored boxes.

Red, Blue, Green, Orange, and Purple. How many different combinations can we make

from any three of those five colored boxes. So the combination notation is five Choose

three. The Combination formula is five factorial divided by five minus three factorial times

three factorial. To solve with the Ti 89 calculator. Go to

second, Math. Math is the five key. Choose number seven, Probability. And choose number

three, n C r. Now on the calculator you see the Combination

notation n C r with an open parentheses. Enter the n variable which is five. Enter a comma,

and enter the r variable, which is three. Now put a closed parentheses. To calculate the answer, hit the ENTER button

on the lower right of the calculator. And the Answer is ten. You can make ten different

Combinations from any three colors of the total five colors. To see a video on how to do Permutations on

the Ti 89 calculator, click here. If you like this video, please give it a thumbs

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Thanks homie

I really thank you men!!

The programming on the TI84 was better, why did they change it… with this you have to plug in a comma and closed parenthesis in addition to the numbers.

omg tyvm