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

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 Correct Answer m + r - 2j

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Which method is suitable for analyzing a beam when the degree of kinematic indeterminacy is less than a degree of static indeterminacy?
If in a pin-jointed plane frame (m + r) > 2 j (where m is number of members, r is reaction components and j is number of joints), then the frame is