The number of degrees of freedom in a planar mechanism having

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The number of degrees of freedom in a planar mechanism having n links and j simple hinge joints is

1. 3(n – 3) – 2j
2. 3(n – 1) – 2j
3. 3n – 2j
4. 2j – 3n + 4

Correct Option: B

DOF= 3(n – 1) – 2j