Combination TI-84 | TI-83 Example

Joestat wants you to complete the following combination TI-84 and TI-83 examples.  Joestat owns 8 distinguishable movies.

Problem 1 : 5 of the movies of the 8 are selected.  How many ways 5 movies be selected?
(Note: Since the question give no on order mattering, we can assume that order doesn’t matter and we are working with a combination.)

Problem 1 : Solution

First verify that it is a combination problem:

  1. Selecting a number of objects (r) from the the total (n)
    Without Replacement
    (Check)
  2. Order Doesn’t Matters
    (Check)
  3. Items are distinguishable from another.
    (TYPE)  Use:

n = 8
r = 5

Calculate the following Combination problem on your TI-83 or TI-83 calculator: _n C _r = {_8}C _5 = 56

Using the TI-84 or TI-83 calculator to compute the combination problem:

| [ 8 ] | [MATH] | [ LEFT ] | [ 3 ] | [ 5 ] | [ENTER] |

Combination TI-84 and TI-83

Congratulations, in this example you have successfully solved a combination problem using your TI-84 and Ti-83 calculator.  If you follow the instructions you should be able to solve all simple combinations.

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Last Modified on September 7, 2013 by JoeStat

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