Question

are sets?
1. Which of the following collections
(1) All person on earth​

Answer 1

1)A collection of all students in your school.

2)A collection of 5 best writers india.

3)A collection of natural numbers upto 50.

4)A collection of all even integers.

5)A collection of first 10 prime number.

6)A collection of dangerous animals of the world.