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At a certain hotel, every room has air conditioning or cable TV
Tuesday 20 September 2016, by
At a certain hotel, every room has air conditioning or cable TV or both. If 30 percent of the rooms have air conditioning, what percent of the rooms have air conditioning and cable TV? (1) 80 percent of the rooms have cable TV (2) 70 percent of the rooms have cable TV but not air conditioning (...)
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