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on a street with 24 houses 9 houses have fewer than 6 rooms, 8 houses have more than 7 rooms and, and 4 houses have more than 8 rooms. What is the total number of houses on street that are either...

Each person, in an IT department of 60 people, works on at least one of 3 major projects: system security, program implementation, platform development. 23 people work on system security, 28 work...

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