If a bag contains 3 red and 7 blue marbles, what is the probability of drawing 2 red in a row without replacement?
✓ Correct Answer: Option B
P(1st red) = 3/10. P(2nd red|1st red) = 2/9. P(both) = (3/10)(2/9) = 6/90 = 1/15.
P(1st red) = 3/10. P(2nd red|1st red) = 2/9. P(both) = (3/10)(2/9) = 6/90 = 1/15.