The sum of the squares of three numbers is 138, while the sum of their products taken two at a time is 131. Their sum is

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Q 1483667547.     The sum of the squares of three numbers is 138, while the sum of their products taken two at a time is 131. Their sum is:
A

20

B

30

C

40

D

None of these

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(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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