hi tutors,
I picked up B, because I think that state 1 is not sufficient and that state 2 is sufficient
I can get some examples for state 1 as following:
for example, X=1, Y=0, then XY = 0, which is not even
for example ,X=2, Y=1, then XY = 2, which is even.
Hi Zoe, your reasoning here is good - just keep in mind that zero is an even number! (https://en.wikipedia.org/wiki/Parity_of_zero) So if x=1 and y=0, then xy = 0 which is even. So if S1 is true, xy must be even :)
2 Explanations