Post on 12-Apr-2017
By: Ahmed Abdulnasir,Deyia Althafery,Ibrahim Qureshi.
Probability
Definition
•Probability is the measure of how likely something will occur.•It is the ratio of desired outcomes to total outcomes.•Probabilities of all outcomes sums to 1.
Example•If I roll a number cube ,there are six total possibilities.(1,2,3,4,5,6)•Each possibility only has one outcome, so each has a PROBABILITY of ½.•For instance ,the probability I roll a 2 is ½, since there is only a single 2 on the number cube.
PracticeIF I FLIP A COIN , WHAT IS THE PROBABILITY I GET HEADS?ANS:_______________WHAT IS THE PROBABILITY TO GET TAILS?ANS: _______________HOW MANY POSSIBILITIES THERE ARE IN THIS QUESTION?ANS: _____________________________________________________
P(HEADS)= ½ .
P(TAILS)= ½ .
IF YOU ADD THESE TWO UP ½ + ½ , YOU WILL GET 1.
Two or more events
•If there are two or more events, you need to consider if it is
happening at the same time or one after the other.
more events
•If the two events are happening at the same time, you need to multiply the two probabilities together.
•Usually, the questions use the word “and” when describing the outcomes.
Experimental probability
•An experimental probability is one that happens
as the result of an experiment.
•The probabilities we have done far are “theoretical probabilities”, because there was no experiment.
Real life examples games and competitions. A baseball coach evaluates a player's batting average
when placing him in the lineup. For example, a player with a 200 batting average
means he's gotten a base hit two out of every 10 at bats. A player with a 400
batting average is even more likely to get a hit -- four base hits out of every 10 at
bats. Or, if a high-school football kicker makes nine out of 15 field goal attempts
from over 40 yards during the season, he has a 60 percent chance of scoring on
his next field goal attempt from that distance. The equation is:
9 / 15 = 0.60 or 60 percent
Logshttp://www.slideshare.net/spike2904/probability-powerpoint
http://www.ehow.com/list_7719506_real-life-probability-examples.html
www.free-training-tutorial.com/probability-games.html
https://www.khanacademy.org/math/probability