Bite-sized brain teaser to solve in a minute or less.
The Three Children
Category: Probability
A family has three children.
You learn that at least one is a boy.
What is the probability that all three are boys?
A) 1/8
B) 1/7
C) 1/4
Solution
|
Possible combinations: BBB, BBG, BGB, GBB, BGG, GBG, GGB 7 possibilities remain after ruling out GGG. Only one is BBB. Answer: B) 1/7 |
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