12.6. Counting with Permutations and Combinations http://www.ck12.org
- You visit 12 colleges and want to apply to 4 of them. In how many ways could you choose the four to apply to?
- For the 12 colleges you visited, you want to rank your top five. In how many ways could you rank your top 5?
14.Explain why the following problem is not strictly a permutation or combination problem: The local ice cream
shop has 12 flavors. You decide to buy 2 scoops in a dish. In how many ways could you do this if you are allowed
to get two of the same scoop? - Your graphing calculator has the combination and permutation formulas built in. Push the MATH button and
scroll to the right to the PRB list. You should seenPrandnCras options. In order to use these: 1) On your home
screen type the value forn; 2) SelectnPrornCr; 3) Type the value fork(ron the calculator). Use your calculator to
verify that 10 C 5 =252.