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31 May 2018, 12:06
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E
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Difficulty:
5%
(low)
Question Stats:
94% (01:04) correct
6%
(02:45)
wrong
based on 41
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The average (arithmetic mean) number of students in 3 economics classes at a certain college is 24. If the total number of students in 2 of the classes combined is 38, how many students are in the remaining class?
(A) 14
(B) 19
(C) 24
(D) 31
(E) 34
(A) 14
(B) 19
(C) 24
(D) 31
(E) 34
31 May 2018, 12:55
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Bunuel
Given Average number of students in three classes are = 24
Therefore total number of the students = 24 * 3 = 72
Given the number of students in two of the classes combined = 38
Hence the number of remaining student in the remaining class = 72 - 38 = 34
31 May 2018, 15:56
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Bunuel
ans: E
from Stem: 24 = (A + 38)/3
A=34 ans.
