· We can similarly calculate that the average piano tuner performs (50 weeks/year)×(5 days/week)×(8 hours/day)/(2 hours to tune a piano) = 1000 piano tunings per year per piano tuner. And then, dividing gives (125,000 piano tunings per year in Chicago) / (1000 piano tunings per year per piano tuner) = 125 piano tuners in Chicago.

Scientists often look for Fermi estimates of the answer to a problem before turning to more sophisticated methods to calculate a precise answer. This provides a useful check on the results. While the estimate is almost certainly incorrect, it is also a simple calculation that allows for easy error checking, and to find faulty assumptions if the figure produced is far beyond what we might reasonably expect. By contrast, precise calculations can be extremely complex but with the exp…

· In 2009, someone had seen 44 RPTs in the Chicago chapter and 14 in the North Shore chapter, for a total of 58. Counting RPTs probably gives you a lower bound, since to be an RPT one must pass a series of exams and pay non-trivial annual dues. But the actual number of piano tuners is most likely higher, for a couple of reasons:

Now, assume that an average family contains four members so that the number of families in Chicago must be about 750,000. If one in five families owns a piano, there will be 150,000 pianos in Chicago. If the average piano tuner serviced four pianos every day of the week for five days

Tools of Renewal » » There are 10,000 Piano Tuners in Chicago, and They all Have Coronavirus March 26th, 2020 Those who Can’t Learn the Lessons of Basic Math are Doomed to Repeat Them The coronavirus news continues to alarm and disappoint…liberals and journalists (but I …

· Case Interview Questions #00062: How many piano tuners (piano technicians who make their living by making minute adjustments to the tensions of the strings of a piano to properly align the intervals between their tones so that the instrument is in tune) are there in the city of Chicago? Possible Answers: This is a market sizing case.

Answer quickly: how many piano tuners are there in the city of Chicago? Robbie Gonzalez. 9/12/12 4:24PM. 29. Save. ... how many pianos a piano tuner can tune in …

· Chicago Piano Service. Chicago Piano Service in Westmont is a company “In Tune With Piano Care,” offering tuning, repair, and restoration by “highly skilled” specialists since 1980. The company also provides piano insurance and casualty loss to cover instruments against damage during moving, natural disasters, water, and vandalism.

(125,000 piano tuning per year in Chicago) / (1000 piano tunings per year per piano tuner) = 125 piano tuners in Chicago. A famous example of a Fermi-problem-like estimate is the Drake equation, which seeks to estimate the number of intelligent civilizations in the galaxy.

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Some people treat their religion like a spare tire--they never use it except in an emergency.

Better to be square than to move in wrong circles.