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04 Sep 2014, 16:53
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C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
83% (00:57) correct
17%
(00:56)
wrong
based on 280
sessions
History
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Not Attempted Yet
What is the sum of all 50 numbers in a list?
(1) The sum of positive numbers in the list 7.3
(2) The sum of negative numbers in the list is 10.6 less than the sum of the positive numbers.
Please read the spoiler below to understand my doubt.
(1) The sum of positive numbers in the list 7.3
(2) The sum of negative numbers in the list is 10.6 less than the sum of the positive numbers.
Please read the spoiler below to understand my doubt.
OA is C.
I know this is a official exercise from GMAC and is probably right, but for me the answer is E. The statements do not give any information about neutral numbers (zeros)
I know this is a official exercise from GMAC and is probably right, but for me the answer is E. The statements do not give any information about neutral numbers (zeros)
04 Sep 2014, 17:05
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brunora
The question asks about the sum of the numbers in a list. When we combine the statements we get that the sum of positive numbers in the list 7.3 and the sum of negative numbers in the list is 7.3 - 10.6 = -3.3. So, the sum of all numbers is 7.3 + (-3.3) = 4.
Answer: C.
As for your doubt: what difference would it make whether we have a few zeros in the list? How would it affect the total sum? Even if there are zeros in the list their sum is 0, no?
02 Dec 2014, 20:42
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1. we do not know +number or other numbers are all zero so not sufficient.
2. same confusion. not sufficient.
1&2. we know positive and negative we can ignore zeros as they do not contribute to sums. Sufficient.
Answer: C
2. same confusion. not sufficient.
1&2. we know positive and negative we can ignore zeros as they do not contribute to sums. Sufficient.
Answer: C
brunora
