Posted by tammy on Wednesday, January 7, 2009 at 6:38am.
First add the "jobs per day" rates of all three people.
1/4 + 1/6 + 1/2 = (3 + 2 + 6)/12 = 11/12 jobs per day
Then divide 1 job by 11/12 jobs/day to get the answer: 12/11 = 1.09 days
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