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Net Income per Common Share
3 Months Ended
Apr. 30, 2011
Net Income per Common Share  
Net Income per Common Share

9. Net Income per Common Share

The following is a reconciliation of the weighted average shares outstanding used for the computation of basic and diluted net income per common share:

 

     Three Months Ended April 30,  
     2011      2010  

Basic weighted average shares outstanding

     162,407,330         168,852,072   

Effect of dilutive stock options, non-vested shares and stock appreciation rights

     2,886,264         3,966,965   
                 

Diluted weighted average shares outstanding

     165,293,594         172,819,037   
                 

For the three months ended April 30, 2011 and 2010, options to purchase 1,333,550 common shares with an exercise price range of $35.01 to $39.58 and options to purchase 932,150 common shares with an exercise price range of $30.93 to $37.51, respectively, were outstanding but were not included in the Company's computation of diluted weighted average common shares and common share equivalents outstanding because their effect would have been anti-dilutive.