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24 Aug 2016, 05:11
Kudos
Bookmarks
B
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:
88% (00:49) correct
12%
(01:10)
wrong
based on 76
sessions
History
Date
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Not Attempted Yet
If the average (arithmetic mean) of a and b is 110, and the average of b and c is 160, what is the value of a − c?
A. −220
B. −100
C. 100
D. 135
E. It cannot be determined from the information given
A. −220
B. −100
C. 100
D. 135
E. It cannot be determined from the information given
24 Aug 2016, 10:22
Kudos
Bookmarks
Bunuel
Question: a - c = ?
(a + b)/ 2 =110 ===> a + b = 220
(b + c)/2 = 160 ===> b + c = 320
(a + b) - (b + c) = 220 - 320 ===> a + b - b - c = - 100 ===> a - c = - 100
Answer: B
