A) 20
B) 15
C) 10
D) 8
Correct Answer: C
Solution :
[c] \[\left( 2+7+6+x \right)=4\times 5\Rightarrow \text{ }x=5\] Also, \[\left( 18+1+6+5+y \right)=\text{ }5\times 10\Rightarrow y=20.\] \[\therefore \sqrt{xy}=\sqrt{5\times 20}=\sqrt{100}=10.\]You need to login to perform this action.
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