# Your statistics teacher tells you that there is a 50% chance that a coin will land heads up. How would you state this chance in terms of a probability?

##### 1 Answer

Jan 14, 2015

IF we have a **fair** coin there are two possibilities:

heads or tails

Both have an equal chance.

So you divide the favourable chances ("success")

**Another example:**

What is the chance of rolling *less* than three with a normal die?

Chance

**Extra:**

Almost no real-life coin is *completely* fair.

Depending on the faces of the heads and tail, the centre of gravity may be a *tiny* bit on the heads or tail side.

This will only show on long term mega-flipping, but this has been done! Google!