It's not a liniar relationship. Why don't you roll a few dice and see? For one, the winning combination is picked from one set, with indifferent order. Which means you can't have a repeated number, and they can come in any combination. You can pick exactly 50 different combination on the cards. However, you can choose the same number on different cards, this means that out of the 50 different combinations, you may or may not have overlaps on the digits themselves. That's just one case where it will not line up. Secondly, the individual ticket's chances DO NOT GO UP, individually each ticket has the same chance, but NO TICKET DIMINISHES THE CHANCE OF ANY OTHER TICKET, again, this is because of overlapping possible conbinations. This situation gets even more complicated when you start to concider that you can have 3 tickets, and each one covering only 2 of the winning numbers, but on their own, are not winners (I picked 6 total just for illustrative purposes). This isn't even getting into the math itself. In short, nope, sorry, it ain't how it works, even if you don't believe me.