State which of the following sets are finite and which are infinite.
The set of leaves on a tree.
A set that contains countable number of different members is called a finite set and a set which contains unlimited or uncountable number of different members is called an infinite set.
Given set:
The set of leaves on a tree.
The number of leaves on a tree can be counted easily.
Therefore, The set of leaves on a tree contains countable number of different members as each individual leaf will be different.
Hence, the set of leaves on a tree is finite set.