Vocabulary
Theoretical Probability- used to find the probability of an event when all outcomes are equally likely.
Equally Likely- outcomes have the same probability.
Fair- possible outcomes of an experiment is equally likely.
Examples
The formula for theoretical probability of an event is
Example:
A bag contains 10 red marbles, 8 blue marbles and 2 yellow
marbles. Find the theoretical probability of getting a blue
marble.
Solution:
There are 8 blue marbles. Therefore, the number of favorable
outcomes = 8.There are a total of 20 marbles. Therefore, the number of total outcomes = 20
Example:
Find the probability of rolling an even number when you roll a
die containing the numbers 1-6. Express the probability as a
fraction, decimal, ratio and percent.
Solution:
The possible even numbers are 2, 4, 6. Number of favorable
outcomes = 3.Total number of outcomes = 6
The probability =
(fraction) = 0.5 (decimal) = 1:2 (ratio)
= 50% (percent)http://www.onlinemathlearning.com/theoretical-probability.html
Video Help
https://www.youtube.com/watch?v=9Zf1vt29QjA
https://www.youtube.com/watch?v=STgbaIhb9fo
https://www.youtube.com/watch?v=A5RiUoQW_kc
No comments:
Post a Comment