2494. If there are m unknown member forces, r unknown reaction components and j number of joints, then the degree of static indeterminacy of a pin-jointed plane frame is given by__________________? September 7, 2025 by Admin A. m + r + 2j B. m – r + 2j C. m + r – 2j D. m + r – 3j ✅ The correct answer is option C.
