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