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You have a bag of coins of which one half are real and the other half are fake. You need to pay for 1 1/2 hours of parking at a meter where one quarter gives you 15 minutes. Every time you put in a fake quarter the meter time is reset to 0. How many coins will you have to pull out of the bag ?
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Junior Quantitative Trader

Interviewed at Old Mission

4.2
Jul 22, 2018

You have a bag of coins of which one half are real and the other half are fake. You need to pay for 1 1/2 hours of parking at a meter where one quarter gives you 15 minutes. Every time you put in a fake quarter the meter time is reset to 0. How many coins will you have to pull out of the bag ?

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