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You are given the data set {14, 35, 44, 47, 49, 49, 50, 51, 56, N}, wh

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You are given the data set {14, 35, 44, 47, 49, 49, 50, 51, 56, N}, wh  [#permalink]

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New post 31 Jan 2019, 01:42
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A
B
C
D
E

Difficulty:

  45% (medium)

Question Stats:

64% (01:28) correct 36% (00:46) wrong based on 53 sessions

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Concentration: Sustainability, Marketing
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WE: Marketing (Energy and Utilities)
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Re: You are given the data set {14, 35, 44, 47, 49, 49, 50, 51, 56, N}, wh  [#permalink]

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New post 31 Jan 2019, 03:16
Bunuel wrote:
You are given the data set {14, 35, 44, 47, 49, 49, 50, 51, 56, N}, where N is an integer not necessarily greater than 56. What is the value of N?

(1) The mean of the data set is 44.3

(2) The median of the data set is 48.5


#1
sum= 395+x
avg = 44.3
total digits = 10
so x= 48
sufficient
#2
median is 48.5
the median = x+49= 48.5*2
x= 48
sufficient
IMO D
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Re: You are given the data set {14, 35, 44, 47, 49, 49, 50, 51, 56, N}, wh  [#permalink]

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New post 31 Jan 2019, 07:44

Solution


Given:
    • A data set {14, 35, 44, 47, 49, 49, 50, 51, 56, N}, where N is an integer

To find:
    • The value of N

Analysing Statement 1
“The mean of the data set is 44.3”
    • Mean of the set = \(\frac{(14 + 35 + 44 + 47 + 49 + 49 + 50 + 51 + 56 + N)}{10} = 44.3\)
      o Implies, N = 443 – (14 + 35 + 44 + 47 + 49 + 49 + 50 + 51 + 56)

    • Thus, we can find a unique value of N.

Therefore, statement 1 is sufficient

Analysing Statement 2
“The median of the set is 48.5”
    • The median of the given set = \(\frac{(5^{th} term + 6^{th} term)}{2}\)
    • One of the middle terms = 49, for any value of N
    • Thus, \(48.5 = \frac{(49 + x)}{2}\)
      o Implies, x = 48
      o Since, there is no 48 in the set, the value of N must be 48

Therefore, statement 2 is sufficient

Hence, the correct answer is Option D.

Answer: D

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Re: You are given the data set {14, 35, 44, 47, 49, 49, 50, 51, 56, N}, wh   [#permalink] 31 Jan 2019, 07:44
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