A question that is Jane Street-esque would be the following: Suppose there is a game. You flip a coin again and again until you see 2 consecutive heads. What is the expected number of coin flips? Follow up: What is the expected number of tails?
Trading Associate Interview Questions
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You are blindfolded and sitting at a table with 100 quarters. Ten of the quarters are tails-up and 90 are heads up. You wish to separate the quarters into two piles, each with the same number of tails. You can flip as many as you like and the piles don't need to be the same size. How do you do it?
What's 2/14? what's 1/16? 27x33? if 5x5x5 rubix cube is sitting on a desk, exactly how many cubes have only one side touching the air.
given 5 people with distinct ages, what is the probability that the five people will sit around a table in ascending order of ages going either clockwise or counterclockwise
Given a number of eggs produced per bird per day how many eggs are produced in x days with y birds.
It Rains 30% of the time on Saturday, 40% on Sunday. How often does it rain on the weekend?
If theres a 0.3 probability it'll rain on Saturday and a 0.4 probability it'll rain on Sunday, what is the range of the possible probabilities it'll rain on at least one day?
A follow-up question: If your sum is 35 now, and you know for sure that you will not roll a 1 in the next round. If your sum is above 42, then the game ends and you take the money. If below 42, you must keep rolling until the sum is above 42. What is the amount of money you are mostly likely to get?
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