To make a tree diagram for probability, branches need to be created with the probability on the branch and the outcome at the end of the branch. One needs to multiply continuously along the ...

Tree diagrams and conditional probability When we have a situation where we are considering several events, it is beneficial to have a way of representing it visually.

Conditional probability is the likelihood of an event occurring based on the occurrence of an earlier event. The second event is dependent on the first event.

The Venn diagram shows there are 29 + 22 = 51 pupils who own exactly one device (this becomes the denominator of the conditional probability). Out of these 51 pupils, 29 own a laptop.