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Senior RC Moderator V
Joined: 02 Nov 2016
Posts: 4125
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If a – b = c, what is the value of b ? (1) c + 6 = a (2) a = 6  [#permalink]

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Difficulty:   25% (medium)

Question Stats: 79% (00:41) correct 21% (01:16) wrong based on 33 sessions

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If a – b = c, what is the value of b ?

(1) c + 6 = a

(2) a = 6

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GMAT Club Legend  D
Joined: 18 Aug 2017
Posts: 5020
Location: India
Concentration: Sustainability, Marketing
GPA: 4
WE: Marketing (Energy and Utilities)
Re: If a – b = c, what is the value of b ? (1) c + 6 = a (2) a = 6  [#permalink]

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1
If a – b = c, what is the value of b ?

(1) c + 6 = a

(2) a = 6

given a-b=c
or say b= a-c

#1
c+6=a
a-c=6
so b = 6
sufficient
#2
a=6
no value of c known
in sufficeint
IMO A
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Joined: 24 Dec 2017
Posts: 185
Location: India
Concentration: Strategy, Real Estate
Schools: Johnson '21
Re: If a – b = c, what is the value of b ? (1) c + 6 = a (2) a = 6  [#permalink]

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a-b = c
a-c = b

St1:
c+6=a
6=a-c
Hence b=6
Sufficient

St2:
a=6
6-c=b
6=b+c
Insufficient

IMO A Re: If a – b = c, what is the value of b ? (1) c + 6 = a (2) a = 6   [#permalink] 19 Feb 2019, 00:30
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If a – b = c, what is the value of b ? (1) c + 6 = a (2) a = 6

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