Probability

Definition

How likely something is to happen.

well, yes! it's more like unpredictable.

Many events can't be predicted with total certainty. 

The best we can say is how likely they are to happen, using the idea of probability. 

 Examples:

1. Tossing a Coin 

When a coin is tossed, there are two possible outcomes: 

Heads (H)

OR

Tails (T)

We say that the probability of the coin landing H is ½.

And the probability of the coin landing T is ½.

2. Throwing Dice 

When a single die is thrown, there are six possible outcomes: 1, 2, 3, 4, 5, 6.

The probability of any one of them is 1/6.

Formula

More examples: 

 

Probability Line

We can show probability on a Probability line:

Answer: Probability is always between 0 and 1

Now, let's watch the tutorial:

Now, Let's try some exercises!

References: 

https://www.mathsisfun.com/data/probability.html 

Images 
http://www.mathgoodies.com/lessons/vol6/intro_probability.html