The Geometric Mean (GM) for the series 1, 3, 9 is / » Fundamentals of Business Statistics solved MCQs / By admin Question: The Geometric Mean (GM) for the series 1, 3, 9 is A. 3 B. 2 C. 1/3 D. ½ Answer» a. 3 Note: The above multiple-choice question is for all general and Competitive Exams in India.