Probabilty

Probability is the quality of being probable or the extent to which something likely to happen.

For example, when tossing a coin, there are two possibles outcomes which is the Head or the Tail. So, the probability of the coin landing either Head or Tail is 1/2 . 

 This is also the same with throwing dice, when it is thrown there are six possible outcomes which is 1,2,3,4,5 or 6. The probability of any one of them is 1/6.

Tree Diagram

Below is the picture of a Tree diagram:

We can extent it into two tosses of a coin and calculate by multiplying probabilities along the branches and add probabilities down the columns:

More explanation below: