What is the average (arithmetic mean) of a, b, and c? (1) : DS Archive
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# What is the average (arithmetic mean) of a, b, and c? (1)

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19 Dec 2004, 18:07
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14. What is the average (arithmetic mean) of a, b, and c?

(1) abc = 27
(2) a + b + c = 3
3 3 3

I got that (2) is sufficient but how do you know that (1) is insufficient?
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21 Dec 2004, 03:31
Why (1) is insufficient?
abc=27
a=1, b =3, c=9
a=3, b=3, c=3

We got different averages, it can't be sufficient. This is just a small example of it
21 Dec 2004, 03:31
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