A bag contains 4 red marbles and 3 blue marbles. If two marbles are drawn at random from the bag without replacement, what is the probability that both marbles drawn are red?

✓ Correct Answer: Option B

The probability of drawing the first red marble is 4/7. After one red is drawn, there are 3 red marbles left out of 6 total. The probability of drawing a second red is 3/6 = 1/2. Total probability: (4/7) * (1/2) = 2/7.