The Clue They're about 1 in 133,000 for both parents and a child sharing the same birthday
The Answer ODDS
The answer "ODDS" fits the clue because it refers to the probability of a specific event happening. In this case, the event is both parents and a child sharing the same birthday. The odds of this happening are about 1 in 133,000, which shows how rare it is. Therefore, "ODDS" is the perfect word to describe this unlikely situation.