SOLUTION: If the probability of having at least 1 boy in a 2-child family is 0.7, what is the probability of having 2 girls?

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Question 861962: If the probability of having at least 1 boy in a 2-child family is 0.7, what is the probability of having 2 girls?
Answer by tommyt3rd(5050) About Me  (Show Source):
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The complement of "at least 1 boy" is "no boys" i.e. 2 girls. Therefore P(2 girls)=1-0.7=0.3