State which of the following sets are finite and which are infinite.
The set of grains of sand in a small jar.
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 grains of sand in a small jar.
The number of grains of sand in a small jar can be counted easily.
Therefore, The set of number of grains of sand in a small jar are countable number.
Hence, the set of grains of sand in a small jar is finite set.