1. 170 oil tankers arrived at a port over the last 104 days. The tankers ar- rived randomly and independently, with the probability being the same every day of the week. Regardless of how many tankers arrive at the port, only two tankers may be unloaded per day. Any extra oil tankers wait for the next day to be unloaded. a) What is the probability that no tankers will arrive on Tuesday? b) What is the probability that more than two will arrive on Friday so that some will wait for Saturday to be unloaded? c) Assuming no tankers are left over from Tuesday, what is the probability that exactly one tanker will be left over from Wednesday and none will be left on from Thuradou?

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