Las Vegas - The board of Mandalay Resort Group Inc. late Tuesday approved MGM Mirage Inc.'s 4.8 billion USD cash offer to buy the gambling company in a deal that would create the industry's dominant casino operator. "Our board has approved the offer from MGM Mirage to purchase the company at 71 USD per share," Glenn Schaeffer, Mandalay's president and chief financial officer, told The Associated Press.