(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

There is a drunk man who is just leaving the pub, he is so drunk that the probability of him taking a step forward is 0.5, and the probability of him taking a step backwards is also 0.5

There is a zero chance of him not taking a step.

After 20 steps, what is the probability of him being 14 steps back into the pub?

2. Relevant equations

Not sure

3. The attempt at a solution

I have no idea where to start for this question, so if somebody could give me a push in the right direction that would be extremely helpful

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# Simple Probability question

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