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Source: Official Guide for GMAT Review 2016 Data Sufficiency ; #134

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6

In planning for a car trip, Joan estimated

In planning for a car trip, Joan estimated both the distance of the trip, in miles, and her average speed, in miles per hour. She accurately divided her estimated distance by her estimated average speed to obtain an estimate for the time, in hours, that the trip would take. Was her estimate within 0.5 hour of the actual time that the trip took?

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Official Guide for GMAT Review 2016

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Section 6.3 Data Sufficiency

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