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List I = 5, 10, 15, 20, 25 List II = 15, 15, 40, 30, 20, X What is th
[#permalink]
21 Jul 2023, 05:27
21 Jul 2023, 05:27
Expert Reply
00:00
Question Stats:
80% (01:11) correct
20% (01:22) wrong based on 10 sessions
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List I = 5, 10, 15, 20, 25
List II = 15, 15, 40, –30, 20, X
What is the value of X, if mean of List I is same as mean of List II?
A. 10
B. 12
C. 15
D. 20
E. 30
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List II = 15, 15, 40, –30, 20, X
What is the value of X, if mean of List I is same as mean of List II?
A. 10
B. 12
C. 15
D. 20
E. 30
Post A Detailed Correct Solution For The Above Questions And Get Kudos.
Question From Our Project: Free GRE Prep Club Tests in Exchange for 20 Kudos
\(\Longrightarrow\) GRE - Quant Daily Topic-wise Challenge
\(\Longrightarrow\) GRE Math Essentials - A most comprehensive handout!!
\(\Longrightarrow\) Free Materials for the GRE General Exam - Where to get it!!
\(\Longrightarrow\) Best GRE Test Books of 2023
Re: List I = 5, 10, 15, 20, 25 List II = 15, 15, 40, 30, 20, X What is th
[#permalink]
17 Sep 2023, 14:10
17 Sep 2023, 14:10
Expert Reply
OE
We are given list 1 and list 2, and we need to find the value of 𝑥 if both lists have
equal mean.
Now, the terms in List 1 are in arithmetic progression with common
difference of 5. If a sequence is in arithmetic progression, mean and median are
same. Median is central value. In list 1, out of five terms 3rd term would be the
median. So, we have,
Mean of List 1 = Median of list 1 = 15
It is given that mean of List 1 is equal to mean of list 2
Mean 15+15+40-30+20+x/6=15
x=30
E
We are given list 1 and list 2, and we need to find the value of 𝑥 if both lists have
equal mean.
Now, the terms in List 1 are in arithmetic progression with common
difference of 5. If a sequence is in arithmetic progression, mean and median are
same. Median is central value. In list 1, out of five terms 3rd term would be the
median. So, we have,
Mean of List 1 = Median of list 1 = 15
It is given that mean of List 1 is equal to mean of list 2
Mean 15+15+40-30+20+x/6=15
x=30
E
gmatclubot
Re: List I = 5, 10, 15, 20, 25 List II = 15, 15, 40, 30, 20, X What is th [#permalink]
17 Sep 2023, 14:10
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