Question

what is set? please tell

Answer 1

is set of collection of well-defined distinct object. doctor belonging to which sector are called its element or member for example is set of even natural number is given by
A={2,4,6,8,10,12,....}
S8 can listen that commonly by three methods
(i). description method
(ii) poster method or ( tabular form).
(iii) rule method (set builder form)

Answer 2

In mathematics, a set is a collection of distinct objects, considered as an object in its own right. For example, the numbers 2, 4, and 6 are distinct objects when considered separately, but when they are considered collectively they form a single set of size three, written {2, 4, 6}.