SOLUTION: if a couple plans to have 6 children, what is the probability that they will have at least one girl?

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Question 316450: if a couple plans to have 6 children, what is the probability that they will have at least one girl?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Let's look at it the other way.
What is the probability that they will have all boys?
P(B,B,B,B,B,B)=(1/2)(1/2)(1/2)(1/2)(1/2)(1/2)=1/64
P(all boys)+P(not all boys)=1
P(not all boys)=1-P(all boys)
P(at least 1 girl)=1-1/64=63/64.