A jar contains 6 red marbles and 4 blue marbles. If two marbles are drawn randomly from the jar without replacement, what is the probability that both marbles drawn are red?

✓ Correct Answer: Option A

The probability of drawing the first red marble is 6/10. After one red marble is removed, there are 5 red marbles left out of 9 total. The probability of drawing a second red marble is 5/9. The combined probability is (6/10) * (5/9) = 30/90 = 1/3.