If N = {integers} and subset C = {integers divisible by 10}, what is C'?

{integers except those divisible by 10}

{ }

{10, 20, 30, 40, …}

{integers}

Question

If N = {integers} and subset C = {integers divisible by 10}, what is C'?

 {integers except those divisible by 10}

 { }

 {10, 20, 30, 40, …}

 {integers}

ash2326 · Answer

C'= elements which are not in C
what do you think is the correct answer?

anonymous · Answer

Honestly I have no clue, I've been working on this problem for like 30 mins.

ash2326 · Answer

Suppose I have a set A={ odd numbers}
and my N={ whole no.s}
then A'= elements which are not in A but are in N
here odd numbers are in A
there are odd as well as even numbers in N
so
A'= even no. s
Do you get this?

anonymous · Answer

Not even a little bit -.-

ash2326 · Answer

Ok, I'll explain you using a diagram. Just wait a minute

ash2326 · Answer

I'll explain you using my example
N= { whole no.} like {0, 1, 2, 3 and so om}
A= { odd no.s} i.e {1, 3, 5, 7}
A is a subset of N, that is all the elements of A are also in N. 
Do you agree with this point?

anonymous · Answer

Yeah.

ash2326 · Answer

good. I'll draw a diagram now

ash2326 · Answer

|dw:1341850306609:dw|
A is contained in N, since A is a subset of N
Do you understand this?