Excluding purchases by businesses, the average amount spent

Published: 6/12/2017
Excluding purchases by businesses, the average amount spent
Source: GMATCLUB.COM

TaN1213 wrote: Excluding purchases by businesses, the average amount spent on a factory-new car has risen 30 per- cent in the last five years. In the average household budget, the proportion spent on car purchases has remained unchanged in that period. Therefore the average household budget must have increased by 30 percent over the last five years. Which of the following is an assumption on which

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