Morgan Stanley
Work in HR? Unlock Free Profile

Morgan Stanley Quantitative Analyst Interview Question

I interviewed in New York, NY and was asked:
"A line in front of movie theater, a free ticket is to given to the first person whose birthday is the same as someone who has already bought a ticket. You choose the position in this line, which position have the largest chance of getting the free ticket?"
Add Tags [?]

Part of a Quantitative Analyst Interview Review - one of 993 Morgan Stanley Interview Reviews

Answers & Comments

of 1

Possibility to win in he nth position:
It is easy to see that Pn/Pn+1 = 1, where n=19.61, so the best place is n=20.
Note that the above calculation uses a 365 day year (no birthday on 29th Febr).

- Andras on Aug 29, 2011
of 0

this is not true for n=2 - if you are second in the line, then probability is 1/365 and formula above gives Pn|n=2 = P[2] = 1/365^2 ...

- Alex on Jun 15, 2012

To comment on this question, Sign In with Facebook or Sign Up

Tags are like keywords that help categorize interview questions that have something in common.