Yeah, its 50% for you

Kinda like that scenario where you there is a prize behind 1 of three curtains... You pick a curtain, then they show you that the prize is not behind one of the other 2 curtains and ask you if you want to switch

If you stay with the first curtain, there is still only a 1/3 chance that the prize is behind it

But if you switch to the other one, there is now a 50% chance that its behind that one



Actually, your question isn't all that similar to that scenario... But that one is always fun to discuss because although its really hard to wrap your head around it, it actually is the case (you can test it out in a real experiment with one of your friends and you will find that you only get the prize 1/3 of the time when you don't switch but 50% of the time if you do)