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What are the chances of having a baby boy after having 3 girls?
Approximately 50% - the same as if you didn't have 3 girls previously.
What are the chances of picking a boy out of a class with 12 girls and 9 boys?
If the person is picked at random, the the probability is 3/7.
What is the probability of having exactly 2 boys out of 6 children?
The answer depends on whether the children are picked at random. If they were selected from inside a girls' school the probability should be quite close to 0. Likewise, if the children were picked inside a boys' school. If six children are picked at random from a large group of children with an equal number of boys and girls, then the answer is 6C2*(1/2)6 = 15/32 = 0.47, approx.
What is the probability that in a family of four children that all four children are girls?
The probably of four girls in a family with four children is 1/16. I got this answer because: Probability of a girl is 1/2 and to get all girls you would multiply it by 1/2 for the rest of the girls.
If a family has three children find the probability that two of the children are girls?
there is a 50% chance that two of them will be girls
