This question is a classic Fermi problem, designed to assess your problem-solving and estimation skills rather than a specific factual answer. The goal is to demonstrate a logical thought process.
To approach this, you would typically:
- Clarify Assumptions: Ask questions like "Are we talking about free users or premium users?" or "Are we considering all regions or specific markets?"
- Identify Key Factors: Consider the total number of Spotify users, the percentage of users who are active at any given time, and the proportion of active users who are listening to music (as opposed to podcasts or other audio content).
- Estimate Values: Make reasonable estimates for each factor. For example, you might estimate the total number of Spotify users globally, then estimate the daily active user percentage, and finally, the percentage of those users listening to music.
- Calculate: Multiply your estimated values together to arrive at a final approximation.
- Refine (Optional): Consider factors like peak listening times, regional differences, and device usage to refine your estimate.
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