Your question is Sequential Draws Without Replacement. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
You have a box with 3 red marbles and 7 blue marbles. You draw two marbles one after the other, without putting the first one back.
What is the probability that both marbles are blue?