CAT Quantitative Ability Questions | CAT Averages, Ratio & Proportion questions
CAT/1997
Question . 86
There are 60 students in a class. These students are divided into three groups A, B and C of 15, 20 and 25 students each. The groups A and C are combined to form group D.
If all the students of the class have the same weight, then which of the following is false?
A : The average weight of all the four groups is the sameB : The total weight of A and C is twice the total weight of B.C : The average weight of D is greater than the average weight of A.D : The average weight of all the groups remains the same even if the number of students are shifted from one group to another.
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Method of solving this CAT Quantitative Ability Question from Averages, Ratio & Proportion question
(c) Since all the students of the class have the same weight, then the average of weight of any group of any no. of students will be the same as that of each students weight. Hence, the average weight of D cannot be greater than average weight of A.