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The average (arithmetic mean) of three numbers is 100.
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11 Aug 2020, 05:07
11 Aug 2020, 05:07
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Question Stats:
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The average (arithmetic mean) of three numbers is 100. If two of the numbers are 80 and 130, what is the third number?
A. 70
B. 80
C. 90
D. 100
E. 110
A. 70
B. 80
C. 90
D. 100
E. 110
Re: The average (arithmetic mean) of three numbers is 100.
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11 Aug 2020, 05:08
11 Aug 2020, 05:08
Expert Reply
Post A Detailed Correct Solution For The Above Questions And Get A Kudos.
Question From Our New Project: GRE Quant Challenge Questions Daily - NEW EDITION!
Question From Our New Project: GRE Quant Challenge Questions Daily - NEW EDITION!
Re: The average (arithmetic mean) of three numbers is 100.
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12 Aug 2020, 07:35
12 Aug 2020, 07:35
1
let X, Y, Z be the three numbers.
(X+Y+Z)/3 = 100
X+Y+Z=300
let X=80, Y=130
Z=300-X-Y=300-80-130=90
Z=90
Final Answer: C
(X+Y+Z)/3 = 100
X+Y+Z=300
let X=80, Y=130
Z=300-X-Y=300-80-130=90
Z=90
Final Answer: C
