Your question is Quantifying Delhi Tennis Balls. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
How many tennis balls are there in Delhi?
Asked in the other analyst interview stage. Treat this as a practical estimation and measurement exercise rather than a question with a known figure.
No source data is provided. You should describe the population, participation rate, ball replacement rate, and inventory assumptions used.