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What is the ratio of houses with smoke alarms to houses without smoke alarms on Gleaner Street?

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What is the ratio of houses with smoke alarms to houses without smoke alarms on Gleaner Street?

1. On Gleaner Street, \(7/18\) of the houses do not have smoke alarms

2. There are \(90\) houses on Gleaner Street

OA A
Source: — Data Sufficiency |