When figuring out the chances of flipping coins, start by looking at one coin flip.

A coin can land in one of two ways: it can show heads (H) or tails (T).

The chance of flipping heads on a single try is:

P(H) = 1/2

And the chance for tails is:

P(T) = 1/2

Now, if you flip a coin more than once, the number of possible outcomes goes up.

For example, if you flip a coin n times, the total possible outcomes would be 2^n.

Let's see what happens when you flip a coin twice:

• The possible outcomes are: HH, HT, TH, TT
• The total number of outcomes is: 2^2 = 4

If you want to find the chance of getting exactly one head when flipping the coin twice, you can use combinations.

Here, there are 2 outcomes that give you one head: HT and TH. Out of the 4 total outcomes, the chance of getting one head is:

P(1 head) = 2/4 = 1/2

So, understanding how to calculate chances when flipping coins involves knowing individual probabilities and using combinations.