Meghalaya High Court Chief Justice Uma Nath Singh administered the oath of office and secrecy to Tripathi at the century-old Raj Bhavan which was attended by Chief Minister Mukul Sangma, his cabinet colleagues and senior civil and police officials.
Tripathi became the 19th Governor of this hill state, succeeding Krishan Kant Paul, who was transferred to Uttarakhand as the Governor of that state.
Tripathi would continue to hold the office of Governor of West Bengal until further orders, Raj Bhavan sources said.