Exhibit 11a AES CHINA GENERATING CO. LTD. STATEMENTS REGARDING COMPUTATION OF EARNINGS PER SHARE (In thousands, except per share amounts) Three Months Ended Three Months Ended August 31, 1996 August 31, 1995 ------------------------ ----------------------- PRIMARY Weighted Average Number of Shares of Common Stock Outstanding 15,634 17,299 Net Effect of Dilutive Stock Options Based on the Treasury Stock Method Using 30 - Average Market Price ------------------------ ----------------------- Weighted Average Shares Outstanding 15,664 17,299 ======================== ======================= Net Income US$ 1,037 576 ======================== ======================= Per Share Amount US$ 0.06 0.03 ======================== ======================= FULLY DILUTED Weighted Average Number of Shares of Common 15,634 17,299 Stock Outstanding Net Effect of Dilutive Stock Options Based on the Treasury Stock Method Using Ending Market Price 30 - ------------------------ ----------------------- Weighted Average Shares Outstanding 15,664 17,299 ======================== ======================= Net Income US$ 1,037 576 ======================== ======================= Per Share Amount US$ 0.06 0.03 ======================== ======================= Exhibit 11b AES CHINA GENERATING CO. LTD. STATEMENTS REGARDING COMPUTATION OF EARNINGS PER SHARE (In thousands, except per share amounts) Nine Months Ended Nine Months Ended August 31, 1996 August 31, 1995 ------------------------ ----------------------- PRIMARY Weighted Average Number of Shares of Common Stock Outstanding 15,638 17,487 Net Effect of Dilutive Stock Options Based on the Treasury Stock Method Using 11 - Average Market Price ------------------------ ----------------------- Weighted Average Shares Outstanding 15,649 17,487 ======================== ======================= Net Income US$ 1,947 1,569 ======================== ======================= Per Share Amount US$ 0.12 0.09 ======================== ======================= FULLY DILUTED Weighted Average Number of Shares of Common 15,638 17,487 Stock Outstanding Net Effect of Dilutive Stock Options Based on the Treasury Stock Method Using Ending Market Price 11 - ------------------------ ----------------------- Weighted Average Shares Outstanding 15,649 17,487 ======================== ======================= Net Income US$ 1,947 1,569 ======================== ======================= Per Share Amount US$ 0.12 0.09 ======================== =======================