What is the maximum number of guests that stayed for at least four days?
Explanation:
We try to maximize guests who stay for four or more days.
Till 9th total 158 guests check-in and all these 158 guests check-out till 10th. ∴ Only those guests who checked in on 5th or 6th can stary for four or more days.
∴ We try to make these guests stay for as long as possible.
Refer the table below.
∴ At most 12 guests can stay for four months.
Hence, 12.
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