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GRE Prep Club Team Member
Joined: 20 Feb 2017
Posts: 2508
Given Kudos: 1053
GPA: 3.39
A certain list consists of 21 different numbers. If n is in the list a
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18 Dec 2022, 09:11
18 Dec 2022, 09:11
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Question Stats:
33% (01:46) correct
66% (01:26) wrong based on 3 sessions
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A certain list consists of 21 different numbers. If n is in the list and n is 4 times the average(arithmetic mean) of the other 20 numbers in the list, then n is what fraction of the sum of the 21 numbers in the list?
(A) 1/20
(B) 1/6
(C) 1/5
(D) 4/21
(E) 5/21
(A) 1/20
(B) 1/6
(C) 1/5
(D) 4/21
(E) 5/21
GRE Prep Club Team Member
Joined: 20 Feb 2017
Posts: 2508
Given Kudos: 1053
GPA: 3.39
Re: A certain list consists of 21 different numbers. If n is in the list a
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20 Dec 2022, 01:13
20 Dec 2022, 01:13
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When you have your answer in percentages/fractions and there are no values in the data given to you, assume values. Here you do not have the value of any number. So assume 20 numbers are all 1. Their average is 1 and sum is 20. Then n is 4 and sum of 21 numbers is 24.
4/24 = 1/6
Answer: B
4/24 = 1/6
Answer: B
gmatclubot
Re: A certain list consists of 21 different numbers. If n is in the list a [#permalink]
20 Dec 2022, 01:13
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