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25 Mar 2021, 04:21
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Solution:
St(1):- x + y = 15
Several values of x and y are possible and no unique value can be determined for x and y. (Insufficient)
St(2):- sqrt(xy) = 6
=> xy =36
=>x=y=6 or x=3 and y=12 or x=12 and y=3
Thus we cannot determine a unique answer to √x + √y .(Insufficient)
On combining both,
x + y = 15 & x=12 /y=3 or x=3 and y=12 (Since x=y=6 is not possible as x+ y =15)
Either ways, √x + √ y = √12 + √3 or √3 + √12 yielding the same value.
No other value is possible when combining both statements. (option c)
Devmitra Sen(GMAT Quant Expert)
St(1):- x + y = 15
Several values of x and y are possible and no unique value can be determined for x and y. (Insufficient)
St(2):- sqrt(xy) = 6
=> xy =36
=>x=y=6 or x=3 and y=12 or x=12 and y=3
Thus we cannot determine a unique answer to √x + √y .(Insufficient)
On combining both,
x + y = 15 & x=12 /y=3 or x=3 and y=12 (Since x=y=6 is not possible as x+ y =15)
Either ways, √x + √ y = √12 + √3 or √3 + √12 yielding the same value.
No other value is possible when combining both statements. (option c)
Devmitra Sen(GMAT Quant Expert)
06 May 2021, 23:25
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Bunuel
Answer: Option C
Video solution by GMATinsight
avigutman
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GMAT 1: 780 Q51 V45
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GMAT 3: 770 Q50 V45
Expert reply
18 Jun 2021, 06:04
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Video solution from Quant Reasoning:
Subscribe for more: https://www.youtube.com/QuantReasoning? ... irmation=1
Subscribe for more: https://www.youtube.com/QuantReasoning? ... irmation=1
