2.3. Permutation Problems http://www.ck12.org
You will see several options, withnPrbeing the second. Press
2, and then enter thervalue. Finally, press
ENTERto calculate the answer.
Example A
Compute 9 P 5 using your TI calculator.
To find the answer, enter the following into your TI calculator:
9 MATH I I I (PRB) 2 (nPr) 5 ENTERAfter pressing
ENTER, you should see the following on your calculator’s screen:
Therefore, 9 P 5 = 15 ,120.
Example B
In how many ways can first and second place be awarded to 10 people? Compute the answer using your TI calculator.
There are 10 people(n= 10 ), and there are 2 prize winners(r= 2 ), so to find the answer, enter the following into
your TI calculator:
10 MATH I I I (PRB) 2 (nPr) 2 ENTERAfter pressing
ENTER, you should see the following on your calculator’s screen: