How many weddings does the average American attend in their lifetime?

This type of question is a Fermi problem, designed to assess your problem-solving and estimation skills rather than your prior knowledge. The goal is to demonstrate a logical approach to breaking down a complex question with limited data. A good strategy involves:

1. Clarifying Assumptions: Ask questions to define the scope (e.g., "What age range are we considering for a lifetime?", "Are we including destination weddings or just local ones?").
2. Estimating Key Variables: Break the problem into smaller, estimable parts. For example:
   • Average number of weddings attended per year (e.g., 1-2).
   • Average lifespan (e.g., 80 years).
   • Consider life stages: fewer in childhood, more in early adulthood/mid-life, fewer in old age.
3. Formulating an Equation: Combine your estimates (e.g., Average weddings/year * Lifespan = Total weddings).
4. Refining the Estimate: Account for factors like close family vs. friends, changing social circles, and potential repeat attendance (e.g., for friends who marry multiple times).

The final number is less important than the structured reasoning and clear articulation of your assumptions and calculations.