SOLUTION: In a hall there are 6 boys and 7 girls. Four of them are randomly selected without replacement. What is the probability that at least one of them is a boy?

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Question 868602: In a hall there are 6 boys and 7 girls. Four of them are randomly selected without replacement. What is the probability that at least one of them is a boy?
Answer by ewatrrr(24785) About Me  (Show Source):
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Hi

13 children: 6B and 7G

 4 chosen

P(at least one is a boy) = 1 - P(all girls) = 1 - (7/13)^4