Question

First off, here's a slightly simpler question to ease you in ;-)
a: You throw a coin multiple times. What's the average amount of throws required to obtain 2 heads in a row?
and the main question (b)...
Starting at number zero, you throw a coin.
Tails means you go down one (therefore equalling -1)
Heads means you go up one (therefore equalling 1)

You repeat this procedure infinite times, so here's an example variation:
0, 1, 2, 3, 2, 3, 4, 3, 2, 3, 4, 3, 4, 5, 6, 7, 6, 7.........

Question is: (b) - how many times on average would 0 have been 'hit' if you threw the coin 100 times? This quest

Answer 1

This is just for fun ;)