How many cabs in NYC question?
Hi guys,
I was asked the question: How many cabs are there in NYC?
I was wondering how you would all approach it!
Thanks.
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How many cabs in NYC question? (Originally Posted: 10/03/2010)
Hi guys,
I was asked the question: How many cabs are there in NYC?
I was wondering how you would all approach it!
Thanks.
well i would just approach it mathematically. estimate how many there are on a given street block, then multiply by 4 (to give a square block), then estimate how many square miles manhattan is, then how many square blocks there are in a mile to calculate the total number of square blocks in manhattan.
i don't think they're looking for the exact right answer, more your ability to reason.
There's a flaw in this. The blocks share sides with each other.
EDIT: mendeleaf beat me to it.
that approach would work for above...
as peacerenity said, its about your logic...but, here's the exact answer: http://en.wikipedia.org/wiki/Taxicabs_of_New_York_City
the supply of yellow cabs for which you need a medallion for is pretty limited - also, its interesting to note that medallions can sell for nearly $1 million bucks...
.
Guess you don't watch cash cab on Discovery...
I would have done NYC population, then like 100 ppl per cab?
you should just know its around 13,000 yellow cabs
this is one of those facts that you SHOULD know if you live in NYC. along with how many 1 oz bags of coke can fit in the antenna of the Empire State Building.
Assuming NYC = Manhattan only, ~2 million people, 1 cab for every ~100 people, ~20,000 cabs?
What if you just called every company and asked them because you "had a big party" that needed escorted and you needed to see if they could meet your needs?
or could you call the DMV and see what they have thats considered public information?
I would take this approach:
-about 3-4 cabs per block (on average) -130 blocks x ~27 blocks (9 avenues and each avenue is about 3 blocks) = ~10,500 - 14,000
@ EngPhD
You're correct. I realized that after I had already posted my answer. It's not exactly 2 sides per square block though. It varies depending on the area and its shape.
I was asked how much I would charge to clean every window in NYC.
"I don't expect to have to answer that question until my account here blows up, so lets move on, shall we?"
CASH CAB!
How many libraries are in boston? Guesstimation (Originally Posted: 12/12/2012)
How would you answer this guesstimation? Just curious to see what people's approaches would be.
There is only one library in Boston. There used to be two, but one of them burned down and every book was lost. Which is a shame because they hadn't even finished coloring them yet.
Compare Boston to your own town. IE in my town, there is 1 library for about 10,000 people. Boston has about 620,000 people so I'd guess about 60.
Edit: Forget my initial post
I'm way off I realize. Harvard has 90 libraries alone.
Are you counting elementary and secondary schools? My relatively small college had 3 libraries...think this is too low.
There are hundreds of libraries located in Metropolitan Boston. There are over 50 libraries in the Harvard University system alone.
Why did nobody give a structured answer yet, only final numbers? The final number is more or less irrelevant. The interviewer wants to see how you structure a problem.
First of all figure out what kind of libraries exist: Elementary schools, middle schools, highschools, universities, community colleges, public libraries, private libraries. Then guess how many libraries are associated with these places and how many persons per each type of library. Give rationales behind each answer from your own experiences (e.g. in my home town i know that etc....). Calculate the total numbers for each library type based on the population of Boston and finally add all numbers up. If you have no clue, just answer 42
Would ding you for using guesstimate, irregardless of your other qualifications/answers.
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