You want to know, if you choose three letters from the English Alphabet, how many different sets you will get? What if we restrict that order of the 3 letters is important? That is "abc" is different from "bac." What if we don't care about the order? That is "abc" is the same like "cab", or "cba."
We start this lesson presenting you a very explicit development of the above cases. After the lesson you will be able to understand the difference between a combination and a permutation. This will in turn enable you to determine probabilities in later lessons. Go get it!
Lesson's Content
Lesson's Glossary
Combination: Any arrangement in which order is not important.
Factorial! n! represents the product of all the whole numbers from n to 1. n! is the product of all the whole numbers from n down to 1 - used in probability.
Permutation: Any arrangement in which order is important.
Probability: The possibility of an event to happen. The probability of getting an even number when rolling a 6 sided dice is 50%.
Vocabulary Puzzle
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