Answer:
1/6 chance.
Step-by-step explanation:
First, there is a 1/3 chance of picking a 3 out of 3 cards. After you pick the three, there is only a 2 and a 4 in the bag left, so its a 1/2 chance of picking a 4, the only one greater than three. Multiply 1/3 by 1/2 and you get 1/6.