Concept: If a cube of a number is negative then the number is also negative, For example, x=−3 Therefore, x3=−3×−3×−3=−27 Calculation : x3=−29.8 ⇒x=−ve Now, using equation (2), we get ⇒y3=3x We know that value of x is negative, so ⇒y3=3(−ve)=−ve So, y is also negative Now, if both the terms x and y are negative Sum of negative terms is always negative ⇒3(−ve)+2(−ve) ⇒−ve ⇒3x+2y is negative. ∴ Both Statement - I and Statement - Il are together sufficient to answer the question.