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

http://youtube.com/v/I1b_WJ6Sr-E