The Birthday Paradox

Step 3: Counting Pairs

With only 23 people in a room, the odds that two share a birthday pass 50%. Fill a room, count the pairs, run the numbers a thousand times, and see why the same math keeps hackers up at night.

  1. The Bet
  2. Fill the Room
  3. Counting Pairs
  4. The Math
  5. Run It a Thousand Times
  6. Birthday Attacks