There are 4 twos, 4 fours, 4 sixes, 4 eights, and 4 tens. That's all the even
cards.
That's 4∙5 or 20 ways, so the probability that you drew an even card on the first
draw is 20 ways out of 52 ways, or 20/52 probability that you drew an even card on
the first draw. That reduces to 5/13.
For each of the times you drew an even card first, there will be only a deck of 51
cards that contains only 19 even cards. That probability is 19/51.
So the desired probability is (5/13)(19/51) = 95/663 = 0.1432880845 or about
14.3%.
Edwin