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In an office, 40 percent of the workers have at least 5 [#permalink]
10 Feb 2004, 13:53
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In an office, 40 percent of the workers have at least 5 years of service, and a total of 16 workers have at least 10 years of service. If 90 percent of the workers have fewer than 10 years of service, how many of the workers have at least 5 but fewer than 10 years of service?