Question

Let A = {1, 2, 3, 4,}, B = {3, 4, 5, 6, 7}, and C = {2, 3, 5, 7}

Find: A∩C

Answer 1

that symbol stands for the elements that belong to A and C at the same time so the answer is { 2,3}

Answer 2

A intersect C means what do both sets have in common
{2, 3}