2QUESTION 2 OF 3
Answer & explanation
The official answer, with Fermi’s reasoning step by step.
Answer & explanation
Official answer
710,000
passengers
How to estimate it
Fermi’s official “Napkin math”
How many big cruise lines can you name? Carnival, Royal Caribbean, Norwegian, MSC. Call it a dozen, with maybe 25 ships each. A typical ship carries about 2,500 passengers.
- Big cruise lines
- ~12
- Ships each
- × 25
- Passengers per ship
- × 2,500
- 12 × 25 × 2,500
- ≈ 750,000
Rounded assumptions may give a slightly different estimate. The official answer above is the game’s reference value.
Source calculation & reference
- Ocean cruise passengers in 2025, a record (CLIA)
- 37.2 million
- Average cruise length (CLIA)
- × 7.0 days
- ÷ 365 days
- ≈ 713,000
- ≈
- 710,000 passengers
Reference cited by Fermi: CLIA 2026 State of the Cruise Industry: 37.2M passengers in 2025, 7.0-day average
How close was your guess?
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Compare by ratio: divide the larger number by the smaller one. The closer to 1×, the better.