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What is the mode of the list above?

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What is the mode of the list above?  [#permalink]

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New post 20 Aug 2018, 04:35
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Difficulty:

  55% (hard)

Question Stats:

36% (00:58) correct 64% (01:02) wrong based on 60 sessions

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GMAT CLUB TESTS' FRESH QUESTION:



{a, b, c, d}
What is the mode of the list above?


(1) The product of no two elements of the list is positive

(2) The range of the elements of the list is 0

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Re: What is the mode of the list above?  [#permalink]

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New post 20 Aug 2018, 04:43
A? mode = 0
1) The product of no two elements of the list is positive
[ 0, 0, 0, 0] [ -1, 0, 0, 1] [ -1, 0, 0, 3]

statement 2 is a subset of statement 1: hence 2 can't be sufficient
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Re: What is the mode of the list above?  [#permalink]

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New post 21 Aug 2018, 08:58
1
B

1. {0,0,0,0} , {0,2,0,-2}
Insufficient
2. Range = 0 {0,0,0,0}, {-1,-1,-1,-1},{2,2,2,2}
Mode = 4
Sufficient
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Re: What is the mode of the list above?  [#permalink]

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New post 21 Aug 2018, 08:59
B

1. {0,0,0,0} , {0,2,0,-2}
Insufficient

2. Range = 0
{0,0,0,0}, {-1,-1,-1,-1},{2,2,2,2}
Mode = 4
Sufficient
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Re: What is the mode of the list above?  [#permalink]

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New post 21 Aug 2018, 13:38
pratik2018 wrote:
B

1. {0,0,0,0} , {0,2,0,-2}
Insufficient

2. Range = 0
{0,0,0,0}, {-1,-1,-1,-1},{2,2,2,2}
Mode = 4
Sufficient


The number that occurs the most in the set is called mode. Statement B just says that range = 0 and as you correctly identified , set can be made of different combinations but does not necessarily gives us the mode.
So B is insufficient
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Re: What is the mode of the list above?  [#permalink]

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New post 21 Aug 2018, 17:51
pratik2018 wrote:
B

1. {0,0,0,0} , {0,2,0,-2}
Insufficient
2. Range = 0 {0,0,0,0}, {-1,-1,-1,-1},{2,2,2,2}
Mode = 4
Sufficient



You clearly have no idea what the mode is. Mode is the most repeated number in a sequence. And I believe only the first one is sufficient in that sense. (A)

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Re: What is the mode of the list above?  [#permalink]

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New post 22 Aug 2018, 11:39
Is the answer A
St1: {0,0,0,0},{0,1,-1,0} mode 0
st2: range 0 : highest and lowest numbers are equal, so all numbers are equal.Hence the numbers can be anything. Insufficient
Re: What is the mode of the list above? &nbs [#permalink] 22 Aug 2018, 11:39
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