Answer:
%50
Step-by-step explanation:
The probability that you will get any of the cards it 50/50. There are even amount of cards, two have even numbers and two have prime numbers. 3 and 5 are primes, and 4 and 6 are even.
So the chances that you get an even or a prime number is 50%.
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I hope this helps!
-No one.
p.s I did not make up this answer, as this is the math that I did myself. I am putting this notice here in the case someone tries to say that I made this up, like previous answers I have put, although they were the correct answers.