Right and Wrong Permutations and Combinations Methods And Pointers That Will Make You Ace These On Your CSET Exam

 Print this Article

The number we plug in for n! is 5 because there are 5 letters in the word HAPPY. The number we plug in below is 2! because the letter P repeats two times:

Remember, only use this permutation formula when some of the item possibilities are alike.

Example: How many permutations are there for the letters in the word, HOLLOW?

The number we plug in for n! is 6 because there are 6 letters in the word HOLLOW. The numbers we plug in below are:
The letter O repeats itself two times: 2!
The letter L repeats itself two times: 2!
Therefore the bottom numbers are 2!2!

Combinations

In permutations, the order is all important — we count abc as different from bca. But in

Popularity: 20% [?]

Continue Lesson - Pages: 1 2 3 4 5 6 7 8 9

Did you find this lesson helpful? Would you like to be alerted when a new lesson like this is posted?

 Subscribe to ACE the CSET Blog
What is RSS?

Or, Subscribe via email:

Comments

Right and Wrong Permutations and Combinations Methods And Pointers That Will Make You Ace These On Your CSET Exam Sponsers


If you find this site useful, please leave a donation for our writers so you can enjoy the spirit of giving too.

• Power Quote

  The path to our destination is not always a straight one. We go down the wrong road, we get lost, we turn back. Maybe it doesn't matter which road we embark on. Maybe what matters is that we embark. - Barbara Hall, Northern Exposure, Rosebud, 1993

Motivational Screensaver For the CSET

Reduce CSET Stress And Negativity With This Motivational Screensaver For Teacher Candidates