Tue
May
25
Tuesday Teaser #17
A brilliant, although completely useless, counter-intuitive probability puzzle this week.
- If I have exactly two children and at least one of them is a boy, what is the probability that both of them are boys?
- If I have exactly two children and at least one of them is a boy born on a Tuesday, what is the probability that both of them are boys?
Are these two probabilities the same or does the seemingly arbitrary “born on a Tuesday” change matters?
A controversial puzzle taken from this week’s New Scientist.
