## Combinations and the relationship between permutations and combinations and problems involving restrictions.

LO: To calculate the number of different combinations and permutations from chance events.

Know:

• How to construct an experiment
• The definition of with and without replacement
• Probability is a scale from 0 to 1.
• Determine the probability of events.
• The difference between Combinations and Permutations.

Understand:

• the difference between combinations and permutations of chance events.

Do:

• I can calculate the different combinations and permutations of chance events.

# Factorial Notation # Permutations ### To put it into English terms, permutations are also similar to anagrams (rearranging the letters of a word to form new words). eg.) the letters of “listen” could be rearranged to spell “silent”, so silent is a permutation of listen. # Combination ### For example, if I have 3 letters, ABC, and I wanted to find how many 2 letter combinations I could find then 