On a street with 25 house, 10 house have fewer than 6 rooms, 10 houses have more than 7 rooms and 5 houses have more than 8 rooms. What is the total number of hoses on the street that are either 6,7 or 8 room houses?

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On a street with 25 house, 10 house have fewer than 6 rooms, 10 houses have more than 7 rooms and 5 houses have more than 8 rooms. What is the total number of hoses on the street that are either 6,7 or 8 room houses?

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