Trader Assistant Interview Questions

578 trader assistant interview questions shared by candidates

There are currently 2 boys and an unknown # of girls in a hospital. A mother gives a birth to a baby but its sex is not known. The nurse picks up a baby randomly and it turns out to be a boy. What is the probability that the mother bore a boy?
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Assistant Trader

Interviewed at Susquehanna International Group

3.8
Jun 2, 2012

There are currently 2 boys and an unknown # of girls in a hospital. A mother gives a birth to a baby but its sex is not known. The nurse picks up a baby randomly and it turns out to be a boy. What is the probability that the mother bore a boy?

50% of population does not smoke, 20% are heavy smokers and 30% are light smokers. If heavy smokers are twice as likely to die as light smokers, and light smokers are twice as likely to die as non-smokers then what is the likelihood that if someone died they were a heavy smoker?
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Quantitative Trader Assistant

Interviewed at Susquehanna International Group

3.8
Mar 19, 2014

50% of population does not smoke, 20% are heavy smokers and 30% are light smokers. If heavy smokers are twice as likely to die as light smokers, and light smokers are twice as likely to die as non-smokers then what is the likelihood that if someone died they were a heavy smoker?

Have a tricycle. Will travel on it for 1000 miles. Have two spare tyres with you (hence 5 in total). a) If you want each of them to be worn the same by the end of the journey, how much will each of the tyres travel on the ground. b) What is the minimum number of stops you have to make in order to achieve this.
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Assistant Trader

Interviewed at Jane Street

4.4
Apr 29, 2013

Have a tricycle. Will travel on it for 1000 miles. Have two spare tyres with you (hence 5 in total). a) If you want each of them to be worn the same by the end of the journey, how much will each of the tyres travel on the ground. b) What is the minimum number of stops you have to make in order to achieve this.

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