A has 6 dollars and B has 4 dollars. They bet one dollar each time by flipping an unbiased coin until one of them runs out of money. What is the probability of A winning all the money.
Trainee Trader Interview Questions
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1) How many times do you have to flip a coin such that the probability of getting 2 heads in a row is at least 1/2? answer: 4 2) You have 1 fair coin and 1 coin with 2 heads. Given that the first flip was a heads what is the probability of getting another heads? Answer: 5/6 3) We are sending 1s and 0s. And there is a 10% chance that the wrong number is sent so we send the number 3 times and the opposing party takes the majority of the 3 tries to be the correct message. What is the probability that we send the wrong message? Answer: 0.028 4) How many sets of A,B,C are there such that they are all non-negative integers and A+B+C<10. Answer: 13C3 = 286. Basically you have 3 dividers and 10 balls at first, but if you add a fourth divider such that A+B+C+D=10, then you've basically got a standard balls and bins problem with 10 balls and 4 bins.
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The pattern of aptitude test was highly unexpected.
How many street lights are there in Chicago
526 x 899 Or something like 72 x 0.00912
Name a time when you got angry
Draw me a graph of profit against price for a call option with fee £3. What is interesting about this graph to traders?
Similar type probability and market-making questions to other trading firms. Big emphasis on quick mental maths
Angle between the hour and minute hand at 3:30
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