The degree of static indeterminacy of a pin-jointed space frame is given by_____. | Civil Engineering MCQ's

A.    m + r - 2j
B.    m + r - 3j
C.    3m + r - 3j
D.    m + r + 3j
where m is number of unknown member forces, r is unknown reaction components and j is number of joints

Ans:B