Jev example · Probability games

The birthday-room surprise

Are shared birthdays already more likely than not?

Model challengeschoice

State

This is the context Jev receives before answering the typed question.

{
  "people": 23,
  "assumptions": "Birthdays are independent and uniformly distributed across 365 days; ignore leap years."
}

Typed questions (1)

Your answer

choice

Is the probability of at least two people sharing a birthday above or below 50%?

Try in Playground
  • above | Above 50%.
  • below | Below 50%.
  • exact | Exactly 50%.

Try changing the scenario

Try 22 people, then 24, to locate the threshold.

Catalog source: TypeSafeAI/typesafe-playground, reused under MIT. This is an independent community catalog, not an official TypeSafe AI product.

Background source: Background: Berkeley's Monty Hall discussion; original examples and variations.