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Jack is putting together gift boxes at a rate of 3 per hour in the first hour. Then jill comes over and yells, ''Work faster!'' jack, now nervous, works at the rate of only 2 gift boxes per hour for the next 2 hours. Then Alexandra comes to Jack and whispers. ''The steadiest hand is capable of the divine. Jack, calmer, then puts together 5 gift boxes in the fourth hour. What is the average rate at which Jack puts together gift boxes over the entire period? |
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