(a) Unless otherwise provided in the articles of incorporation or in bylaws adopted by the members, 10 percent of the members entitled to vote shall constitute a quorum at a meeting of members.

(b) If a quorum is present, the affirmative vote of a majority of the members represented at the meeting shall be the act of the membership unless the vote of a greater number is required by this article, the articles of incorporation, or the bylaws.

(c) When a quorum is once present to organize a meeting, the members present may continue to do business at the meeting, or at any adjournment thereof, notwithstanding the withdrawal of enough members to leave less than a quorum.

(d) A majority of the members represented at a meeting, whether or not a quorum is present, may adjourn such meeting from time to time.