Question

If T = {positive integers} and subset W = {5, 10, 15, 20, …}, what is W'?

A {positive integers except those divisible by 5}
B {5, 10, 15, 20, …}
C { }
D {1, 2, 3, …}

Answer 1

a since w is a subset of all positive integers and w is all divisible by 5, so it would be like {1,2,3,4,6,7,8,9} or a

Answer 2

it referring to W' or the opposite of W