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09 Apr 2019, 23:43
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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:
15%
(low)
Question Stats:
79% (00:59) correct
21%
(00:51)
wrong
based on 57
sessions
History
Date
Time
Result
Not Attempted Yet
Which one of the following numbers can be removed from the set S = {0, 2, 4, 5, 9} without changing the average of set S?
(A) 0
(B) 2
(C) 4
(D) 5
(E) 9
(A) 0
(B) 2
(C) 4
(D) 5
(E) 9
Source: Nova GMAT
Difficulty Level: 600
Difficulty Level: 600
10 Apr 2019, 00:08
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Avg of given set=(0+2+4+5+9)/5=4
Let the number removed be x so that there is no change in average of set
Now atq (0+2+4+5+9-x)/4=4
Solving for x we get, 20-x=16
X=4
Posted from my mobile device
Let the number removed be x so that there is no change in average of set
Now atq (0+2+4+5+9-x)/4=4
Solving for x we get, 20-x=16
X=4
Posted from my mobile device
10 Apr 2019, 00:50
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Bunuel
Which one of the following numbers can be removed from the set S = {0, 2, 4, 5, 9} without changing the average of set S?
(A) 0
(B) 2
(C) 4
(D) 5
(E) 9
(A) 0
(B) 2
(C) 4
(D) 5
(E) 9
Average of the set = 0 + 2 + 4 + 5 + 9 / 5 = 4
Average will remain same if we remove 4.
Sum of the set = 0 + 2 + 4 + 5 + 9 = 20
20 - 4 / 4 = 4.
Thus C is the correct answer.
