(a) A majority of the number of directors fixed by the articles or bylaws of a corporation constitutes a quorum for the transaction of business unless a greater number is required by the articles or bylaws. The act of a majority of the directors present at a meeting at which a quorum is present is the act of the board, unless the act of a greater number is required by the articles or the bylaws.
(b) The provisions of this section apply with equal force to committees of the board established under AS 10.06.468 and action by committees.