Question

let x= {[x is a whole number less than 10}y={x[x is an odd number}
what is x and y
{1,2,3,4,5,6,7,8,9}
{0,2,4,6,8}
{1,3,5,7,9}
{0,1,2,3,4,5,6,7,8,9}