** Shares of outsourcing firm WNS WNS.N rise 12% to $73 premarket
** French IT services firm Capgemini CAPP.PA to buy WNS for $76.50 per share, at a premium of 17% to stock's last close
** Capgemini will pay $3.3 bln in cash, excluding WNS net financial debt
** WNS's current market valuation is $3.03 bln
** Deal is expected to close by year-end
** WNS provides services including business process outsourcing and data analytics, and its customers include large organizations such as Coca-Cola KO.N, T-Mobile TMUS.O and United Airlines UAL.O
** As of last close, WNS has risen nearly 38% YTD
** French-listed shares of Capgemini are down 4.54% at 138.65 euros
(Reporting by Ankita Yadav in Bengaluru)
((Ankita.Yadav@thomsonreuters.com;))