Probability, let S={1,2,3,4,5,6}...?

Question

Probability, let S={1,2,3,4,5,6} E={2,4,6} F={1,3,5} and G={5,6}
a. find the event EnFnG

b. are the events F and G complementary?

Answer 1

I suspect that n means intersection.
a. EnFnG = {empty} Because EnF is empty.
b. no