Marginal rate of technical substitution is equal to: / » Mathematical Economics and Econometrics solved MCQs / By admin Question: Marginal rate of technical substitution is equal to: A. mux/muy B. mpl/mpk C. mrsxy/mrs D. mrx/mry Answer» b. mpl/mpk Note: The above multiple-choice question is for all general and Competitive Exams in India.