Question

1. If a couple plans to have 4 children, what is the probability that there will...

1. If a couple plans to have 4 children, what is the probability that there will be at least one girl? Assume boys and girls are equally likely.

2. Find the probability of a couple having a baby boy when their 4th child is born, given that the first three children were all boys. Assume boys and girls are equally likely.

Math   Statistics-And-Probability   
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Answer #1

1. The probability that there will be at least one girl

= 1 - P(there will be no girl)

2. The probability of a couple having a baby boy when their 4th child is born, given that the first three children were all boys

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