Question 743168
a. e replaced the red bead in the bag each time we drew it so we don't know how many red beads are in the bag, there might just be one! So we cannot say A is true.

b. We pulled out a green bead so B has to be true.

c. There might be yellow beads in the bag, we just didn't pull one out so we don't know if C is true or not.

d. We replaced the red bead in the bag each time we drew it so we don't know how many red beads are in the bag, there might just be one! So we cannot say D is true.

e. We only drew 1 blue bead at once and then replaced it immediately in the bag, so we cannot say how many blue beads are in there.

Hence B is the only definitely true answer.