statement 1 not sufficient as many combinations of x,y and z are possible which can result into different values.
statement 2 implies:
\(x+y+z=0\)
\(x=-(y+z)\)
substitute for x
\(\frac{(-y^3 - z^3 - 3y^2z -3yz^z +y^3 + z^3)}{xyz}\)
\(\frac{-3yz(y+z)}{xyz}\)
\(\frac{-3yz(y+z)}{-yz(y+z)}\)
\(3\)
Sufficient
Answer is B
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Hasnain Afzal
"When you wanna succeed as bad as you wanna breathe, then you will be successful." -Eric Thomas