Question

How to do tree diagrams

Answer 1

In probability?
each arrow shows what % chance it is.
uhhh here’s a pic off google to help

it can be more than 2 arrows and as many times as you like.

Answer 2

Let's take a look at a simple example, flipping a coin and then rolling a die. We might want to know the probability of getting a Head and a 4.
If we wanted, we could list all the possible outcomes:

(H,1) (H,2) (H,3) (H,4) (H,5) (H,6)
(T,1) (T,2) (T,3) (T,4) (T,5) (T,6)

Probability of getting a Head and a 4:
P(H,4) = 112