Lemma
DeepParadoxes
#453 · Probability · Paradoxes

A boy born on a Tuesday

A family has two children. You learn at least one is a boy born on a Tuesday. Assuming sexes and weekdays are independent and uniform, what is the probability both children are boys?

~12 minAnswer checked instantlyParadoxes

Classical — posed by Gary Foshee (2010)

Stuck? A gentle nudge
Something off?
Workspace
Your answer
Loading the math keyboard…

Type naturally — sqrt, pi, / and ^ become notation. Any equivalent form is accepted. Press Enter to check.