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26 Nov 2019, 01:25
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A
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Difficulty:
15%
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Question Stats:
81% (01:18) correct
19%
(01:12)
wrong
based on 160
sessions
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If a+b=7, b+c=14, and a+c=3, what is the average of a, b, and c?
A. 4
B. 6
C. 8
D. 10
E. 12
A. 4
B. 6
C. 8
D. 10
E. 12
26 Nov 2019, 01:42
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We want to find the solution for \(\frac{(a+b+c)}{3}\)
Lets just add given equations
a+b=7
b+c=14
a+c=3
a+b+b+c+a+c=24
2(a+b+c)=24
a+b+c=12
12/3=4
IMO
Ans: A
Lets just add given equations
a+b=7
b+c=14
a+c=3
a+b+b+c+a+c=24
2(a+b+c)=24
a+b+c=12
12/3=4
IMO
Ans: A
26 Nov 2019, 01:55
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Bunuel
If a+b=7, b+c=14, and a+c=3, what is the average of a, b, and c?
A. 4
B. 6
C. 8
D. 10
E. 12
A. 4
B. 6
C. 8
D. 10
E. 12
solve
given eqn
we get a= -2, b=9 and c= 5
avg = 4
IMO A
