Concept:Substitute the given values into the defined binary operation.Explanation:The operation is defined as x∗y=3x+2y−1.We need 3∗−1, so let x=3 and y=−1.Substitute into the formula:3∗−1=3(3)+2(−1)−1Simplify step by step:=9−2−1=7−1=6Thus the value of the operation is 6.Answer:6 (Option C)