It takes a piano tuner about two hours to tune a piano, including travel time.Pianos that are tuned regularly are tuned on average about once per year.Roughly one household in twenty has a piano that is tuned regularly.On average, there are two persons in each household in Chicago.
There are approximately 5,000,000 people living in Chicago.
How to Answer this Problem Solving Interview QuestionĮvaluating this problem, we can see that the solution to this problem would involve multiplying together a series of estimates that would yield the correct answer if the estimates were correct.įor example, we might make the following assumptions: You’d be surprised how many candidates get lost in the analysis and solve for a different question than what was asked. Answers the question that has been asked.Demonstrates quantitative analytical skills.Evaluates and understand the scope of the problem.
A strong candidate demonstrates the following: They are evaluating the approach you use to think out and solve the problem. If you get asked a problem solving question in an interview, remember that they are NOT looking for the RIGHT answer. Interview Question: The Fermi Problem – How many Piano Tuners are there in Chicago? Strategy and Approach to Answering a Problem Solving Interview Question