Question

How to prove a set is a subset of another set?

Answer 1

suppose A is set of natural number less than or equal to 10
B is set of even number between 1 to 10
A={1, 2, 3, 4, 5, 6, 7, 8, 9, 10}
B={2, 4, 6, 8, }
all elements of set B are in set A
therefore set B is a subset of set A
hope it helps you