A bag contains 3 red marbles and 4 blue marbles. then, 2 marbles are drawn from the bag, at random, "without replacement". if th

Question

4 years ago

14

e first marble drawn is red, what is the probability that the second marble is blue

1 answer:

faltersainse [42] · Answer 1 · 2022-01-23T07:26:13+03:00

7 0

3 + 4 +2 = 9 total marbles

If you pick a red one first and don't replace it that leaves a total of 8 marbles left

there are 4 blue marbles

so probability = 4/8, reduces to 1/2 probability of picking a blue marble