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A particle starts at 0 on the infinite integer line.
At each step, +1 and -1 occur with probability each.
What is the expected time to reach for the first time?
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⚡ Build the skills to land top-paying quant jobs. Offer ends in --d --h --m --s-- days -- hours -- minutes -- seconds.
⚡ Build the skills to land top-paying quant jobs. Offer ends in 2d 06h 56m 54s2 days 6 hours 56 minutes 54 seconds.
A particle starts at 0 on the infinite integer line.
At each step, +1 and -1 occur with probability each.
What is the expected time to reach for the first time?