Dear R. U R calculating the contribution of a player, We are discussing the averag of a player,U can say at that time the batting is not so cracker as now.. it is too difficult to carry on an average of 50 in today cricket, There were so many fast bowler at old cricket but U know there is very less body guard equipment at that time so player playes the cricket under the fear and they loose the wicket...If those bowler played today cricket they will not sucsses as compare that time..
So cricket wahi hai lekin cricket khelne ka andaj and tech change ho gayi hai..thats it..