In the 60-member House with an effective strength of 58, 44 Congress MLAs and two Independent members voted in favour of the government while 11 members from opposition BJP voted against it.
Acting Governor Tathagata Roy hurriedly summoned the day-long session of the Assembly late last night asking Khandu to prove his majority on the floor of the House.
Addressing the house, Khandu thanked the members including senior party leaders Nabam Tuki and Kalikho Pul, another former chief minister, for reposing faith in his leadership.
"I will take all the MLAs together as 'Team Arunachal' to fulfil the aspirations of the people," he said adding that his priority would be to complete all important schemes.
More From This Section
Khandu said that he would work across party lines and all members of the House would be given enough financial power so that they can concentrate on their respective constituencies for development to percolate.
The Chief Minister, while appealing to members not to rake up issues of the past, said he would fix responsibilities on every minister of his Cabinet and those who fail to perform, would face action.
In a dramatic turn of events in this land-locked state on July 16, Congress replaced Tuki by choosing Khandu as the new CLP leader, who staked claim to power on the basis of support of 45 party MLAs along with two Independents.
Khaliko Pul, the rebel-turned chief minister, who was unseated by the Supreme Court, returned to the party fold with 30 dissident MLAs.