The first problem asks for the probability that the second marble drawn is blue if the first marble is not replaced. The second problem asks the same but with replacement of the first marble. The third problem asks to draw a tree diagram and list probabilities for flipping a coin twice. The fourth problem asks the same but for flipping a coin three times. The last problem asks for the probability of exactly 2 girls in a family with 3 children if the chance of a boy or girl is equal.

1. A marble is drawn, not replaced and a second marble is drawn
from a bag containing 3 red and 3 blue marbles. What is the
probability that the second marble is blue?

2. A marble is drawn, replaced and a second marble is drawn from a
bag containing 3 red and 3 blue marbles. What is the probability
that the second marble is blue?

3. A coin is flipped twice. Draw a tree diagram of the sample space and list
the probabilities of each outcome.

4. A coin is flipped three times. Draw a tree diagram of the sample space and
list the probabilities of each outcome.

5. In a family of 3 children, with boys and girls equally likely to be born,
what is the probability that exactly 2 kids are girls?