<span>We prove first the direct implication. Assume n is even. Then n = 2k for some integer k. Then 7n + 4 = 14k + 4 = 2(7k + 2), which is even. For the converse, which is “if 7n + 4 is
even, then n is even”, we use a proof by contrapositive. The contrapositive is: “if n is not even (that is, odd), then 7n + 4 is not even (that is, odd) If n is odd, then n = 2k + 1, for some integer k. Then 7n + 4 = 14k + 11 = 2(7k + 5) + 1, which is odd.</span>
Answer: well its 25% i think because if you take them each one all chances are 25% bacause bur it would be 50%/50% because to are the same but the chances of pulling the not that sames ones would also be a 50/50
I REALLY DONT KNOW IF IM RIGHT SO IM SORRY IF NOT IM DUMB
