Bangalore-based Quess Corp, controlled by India-born Canadian billionaire Prem Watsa's Fairfax Financial Holdings, has agreed to buy a 51% stake in the business process outsourcing arm of Tata Group. Quess will pay ₹153 crore in cash for the stake in Hyderabad-based Tata Business Support Services (TBSS). TBSS has a workforce of 27,000 employees and reported ₹661 crore revenue in 2016-17.