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Ross and Rachel have just tied the knot. The probability that they are happy each day depends on whether they were or sad during the
Ross and Rachel have just tied the knot. The probability that they are happy each day depends on whether they were or sad during the last two days, in the following fashion:
Last 2 days Happy/Sad
HH 0.8/0.2
HS 0.5/0.5
SH 0.7/0.3
SS 0.4/0.6
For example, if the newlyweds were sad two days ago and yesterday they were happy, then there is a 70% chance they will be happy tomorrow. On what fraction of days will Ross and Rachel be happy?
Detailed explanation please!
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