Thread: 3 children, probability of boy/girl = 0.5 EASY!

Here is the problem (high school) Probability of getting a boy/girl is 0.5. And a family has 3 children. What is the probability that the oldest is a boy?
Also what is the probability that the oldest is a boy and the youngest is a girl?

Originally Posted by karldiesen

Here is the problem (high school) Probability of getting a boy/girl is 0.5. And a family has 3 children. What is the probability that the oldest is a boy?
Also what is the probability that the oldest is a boy and the youngest is a girl?

There are eight strings of B's and G's of length three.
Half of them begin with a B. So what is the first answer?

Two of them begin with a B and end with a G. So?