# Probability and Counting

by
**nikkicanaleee**

Last updated 4 years ago

** Discipline: **

Math ** Subject: **

Prob/Stat

Principles of counting:Why its used: To deal with large amounts of data such as determining the numbers of possible combinations or event out comes Example: Anna's icecream store has 5 flavors 4 toppings and two sizes. How many possible combinations are there? Answer: 5 x 4 x 2= 40 there are 40 possible combinations.Probability: why it is used: To find the probablility of a desired event occuring. Probablility formula: # of ways desired result CAN happen over total number of possible outcomes. Example: on a six sided die you are wondering the probablity of rolling an odd number if you roll the die once. 3/6= 1/2 the probability of rolling an odd number is 1/2. There are two types of probability independent and dependant which are shown in the examples.

1) ........Principles of counting ..................................................................................2) ...........Probability ...............................................................................3) ..........................................................................................

Probability:Dependant

Probability: Independant

Counting example:

counting example:

Topics

Probability and counting

By: Nikki Canale

Examples

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