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Mathematics, 27.08.2019 12:30 710jonathan

Fifteen sprinters ran the 50-yard dash in an average of 9.5 seconds. of those runners,3 ran the dash in 11.5 seconds. find the average time of the other 12 boys

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Fifteen sprinters ran the 50-yard dash in an average of 9.5 seconds. of those runners,3 ran the dash...
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