Bunuel wrote:
What is the average (arithmetic mean) of x, y, and z ?
(1) x + y = 5
(2) y + z = 7
1. We do not have any information about z. Hence we cannot find
the average of x,y, and z
(Insufficient)2. We do not have any information about x. Hence we cannot find
the average of x,y, and z
(Insufficient)On combining both the sentences,
Case 1 - x = 1, y = 4, z = 3 Average = 1+4+3/3 = 2.67
Case 2 - x = 3, y = 2, z = 5 Average = 3+2+5/3 = 3.34
We cannot get a unique value for the average
(Insufficient - Option E) _________________
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