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Saturday, September 5, 2015

Bitcoin and Cryptocurrency Technologies - Quiz 2 Problem 5

A block in the block chain was found at time t. What is the probability that the next block was found at or before time t + 10 minutes? Assume that the total hash power of the network stays constant. (select all that apply)
More than 50%
Less than 50%
Exactly 50%

I got this wrong first time too.

This one is trickly, the distribution of block finding time is poisson distribution, which is skewed towards the left, which means we have more than 50% chance getting a bitcoin in 10 minutes.

I could have computed that exactly if I wish.

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