For example, in 5th class there is a man about 50 year old . In Reaility, there is no man which is sitting in the 5th class. Now we say that ’empty set’ for this case.

The intersection of any set with the empty set is the empty set. This is because there are no elements in the empty set, and so the two sets have no elements in common. … This is because the set of all elements that are not in the empty set is just the set of all elements. The empty set is a subset of any set.

## RAFI ULLAH

For example, in 5th class there is a man about 50 year old . In Reaility, there is no man which is sitting in the 5th class. Now we say that ’empty set’ for this case.

## Shoukat ali

Zero have nothing so why we called it a number and zero

## Abbas Khan

The intersection of any set with the empty set is the empty set. This is because there are no elements in the empty set, and so the two sets have no elements in common. … This is because the set of all elements that are not in the empty set is just the set of all elements. The empty set is a subset of any set.