GRE® Statistics Averages Practice | Weighted Average | Rule of Alligation | GRE Online Preparation
Автор: Wizako Prep GRE
Загружено: 2020-04-27
Просмотров: 2059
Описание:
An easy GRE weighted mean (weighted averages) practice question. This sample question can be solved in a minute using the standard framework to solve any Averages question.
Alternatively, if you used the rule of alligation, the same question can be solved in less than 20 seconds.
The video discusses both methods and walks you through when the rule of alligation can be used.
Question
The average weight of the women in a group is 60 kg and that of the men in the group is 72 kg. If the average weight of the group is 68 kg, what is the ratio of women to men in the group?
A. 1 : 3
B. 2 : 3
C. 3 : 2
D. 1 : 2
E. 2 : 1
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