Simple Probability Q

[Ncoe]

The reason I post this is not to have it solved, but to discuss and clearify if the to me given answer really is correct.

But just solve it and give your reasoning and I'll write what it's "supposed" to be in a while.

The Q:
There's four balls in a bag. One black, one blue and two red. The bag is shaken and some guy takes two of the balls out. He lookes at the balls and states that one of them is red. What is the probability that the other one is red, aswell?