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If the average (arithmetic mean) of 5 numbers is 4 and the sum of 3 nu
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10 Feb 2022, 07:45
10 Feb 2022, 07:45
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Question Stats:
91% (00:39) correct
8% (01:09) wrong based on 12 sessions
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If the average (arithmetic mean) of 5 numbers is 4 and the sum of 3 numbers is -16, what is the average of the other two numbers?
(A) -12
(B) -8
(C) 12
(D) 18
(E) 24
(A) -12
(B) -8
(C) 12
(D) 18
(E) 24
If the average (arithmetic mean) of 5 numbers is 4 and the sum of 3 nu
[#permalink]
10 Feb 2022, 13:44
10 Feb 2022, 13:44
1
Let, the sum of the other two numbers be m
Given, the sum of first three numbers = -16
So, by definition,
or,\(\frac{(-16+m)}{5}=4\)
or, \(-16+m=20\)
or, \(m=36\)
So, average of other 2 numbers = \(36/2=18\)
Given, the sum of first three numbers = -16
So, by definition,
or,\(\frac{(-16+m)}{5}=4\)
or, \(-16+m=20\)
or, \(m=36\)
So, average of other 2 numbers = \(36/2=18\)
gmatclubot
If the average (arithmetic mean) of 5 numbers is 4 and the sum of 3 nu [#permalink]
10 Feb 2022, 13:44
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