probability Interview Questions

(Posted anonymously by job candidates)

17 Interview Questions: 110 of 17 Sort by  

Mar 14, 2014

Interview Question for Anonymous at Goldman Sachs:

“Consider a random walk on a graph in the shape of the capital letter Y, with nodes at A and B at the top, C at the bottom, and O in the center. With probability 1/3, there is a transition from O to…”


Feb 26, 2014

Interview Question for Strategy Analyst at CarMax:

“Phone interview case question: Expected payout problem. It involved two possible winners to an American Idol competition. There are two possible bets. You can bet on Jordan for $5 and potentially win…”


Feb 7, 2014

Interview Question for Anonymous at LiveRamp:

“IMDB 2.0 - Movie DB Table Structure
Your best friend Betty thinks IMDB is too complicated and challenges you to create a simple movie web site. One page will display movies (with movie name, date it…”


Feb 5, 2014

Interview Question for Anonymous at Robert Bosch LLC:

“Something close to the following, but a little more complicated: How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least…”


Jan 20, 2014

Interview Question for Anonymous at Bloomberg L.P.:

“Suppose there is a building with 25 floors. If n-1 people enter an elevator and press a floor button. What is the probability that when the nth person enters, the 19th floor has already been pressed?”


Nov 10, 2013

Interview Question for Anonymous at PEAK6 Investments:

“My favorite question: Given 3 points on a circle, assume that each will start moving either clockwise or counterclockwise at speed V, independent of the other points. What is the probability that at…”


Apr 25, 2012

Interview Question for Anonymous at Five Rings Capital:

“• Is 1027 a prime number?
• How would you write an algorithm that identifies prime numbers?
• 2 blue and 2 red balls, in a box, no replacing. Guess the color of the ball, you receive a dollar if…”


Mar 28, 2012

Interview Question for Anonymous at Old Mission Capital:

“You have two decks of cards, one normal 52-card deck and one 104-card deck with double every card. Is one deck better than the other if you wanted to get two black cards in a row?”


Mar 16, 2012

Interview Question for Anonymous at Goldman Sachs:

“How would you show a correlation between two types of data?”


Mar 16, 2012

Interview Question for Anonymous at Goldman Sachs:

“What is a normal distribution? What would you think if your data didn't fit one?”