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What is the average (arithmetic mean) of A, B, and 4C?
(1) A + B = 17
(2) C^2 = 49
(1) A + B = 17
(2) C^2 = 49
20 Sep 2013, 06:57
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prateekbhatt
What is the average (arithmetic mean) of A, B, and 4C?
(1) A + B = 17
(2) C^2 = 49
(1) A + B = 17
(2) C^2 = 49
Straight E.
When combined C is either 7 or -7, which give two answers for (A + B + 4C)/3.
Answer: E.
20 Sep 2013, 07:01
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Bunuel
prateekbhatt
What is the average (arithmetic mean) of A, B, and 4C?
(1) A + B = 17
(2) C^2 = 49
(1) A + B = 17
(2) C^2 = 49
Straight E.
When combined C is either 7 or -7, which give two answers for (A + B + 4C)/3.
Answer: E.
But cant we put the value of A+B =17 as given in option 1.
(A+B+4C)/3=?
(17+4C)/3
4C= 3-17
C= 14/4
C= 7/2
Cant we do it this way?
