Do you think I can make it to the next round ?

Hi,

Yesterday I had third round telephone interview for Quant internship at BB (think GS/MS/JPM), everything happened well until I made a terrible calculation mistake at the end (I said BinomialCoefficient(6,3)=60 whereas it is equal to 20) leading me to a wrong result. The interviewer didnt tell me about my mistake during the interview. The thing is that I did very well during the rest of the interview, but there were not many questions, so I think I will be dinged with like 90 percent probability.

Regarding your experience, both as an interviewee or as an interviewer, what would you think of my chances ? zero ?

I am anxiously waiting for the response but I am not optimistic !

 

Was the question: If two evenly matched teams (p(victory) = 0.5) for each game played a 7 game series, what's the probability of the series reaching game seven?

Answer: (6 choose 3)*.5^6 = 5/16

I could easily see you getting dinged for that since a lot of the goal of quant interviews is to see how you think under pressure and understanding mental math.

 

What's the point in your post ?

The thing is that if I got dinged because of a %^##!!& high school level calculation error, I would be really really disppointed, but I know that's the game. I have no other opportunities currently. I was on the wait list after superday at one of these banks but finally got dinged. I put on a crazy amount of efforts in the past three years to be able to got an interview at one of these banks, I went back to study after my mum passed away from cancer in 2012, and I had to pause my studies some years before because of personnal health problem.

Now, I would have no choice but to accept if I got dinged, no big deal User11221122

 

I can safely tell you that you've made it through to the next round. Congratulations.

"After you work on Wall Street it’s a choice, would you rather work at McDonalds or on the sell-side? I would choose McDonalds over the sell-side.” - David Tepper
 

Hi MBBorBust,

Thanks for your answer.

The question was whats the most probable outcome after throwing 6 times in a row a coin with P(Head)=0.3. I compared P(NumberofHead=0) with P(NumberofHeads=1). Then I compared (PnumberofHeads=1) with P(NumlberofHeads=2). No mistake up to that point. I made the error when comparing P(numberofHeads=2) with P(numberOfheads=3) while calculating 6 choose 3. - choose 3 is 6 I think ! at least it must be an integer. So with my wrong calculations I got the result that having 3 Heads is the more probable, while the result is 2 heads....

So thats it, sorry for telling my life in the previous post but I am pretty disappointed to have made that mistake at this stage....

 

Nice posts.

Dont know if I will relax the fuck up if I am dinged because it seems it is essentially my last opportunity as I vé been strait dinged with online applications on most of other banks.

Anyway, thanks to you guys I think I now will be dinged with 89 percent probability. A priceless 1 percent of additional hope

 

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