Answers

2015-07-10T19:10:04+05:30
Sum all runs scored in the tournament, and divide this by the total number of overs faced in the tournament. Add together all runs conceded in the tournament, and divide by total number of overs bowled. Subtract bowled rate from batted rate. 
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2015-07-11T10:52:26+05:30
SUM THE RUNS AND DIVIDE BY THE OVERS HAVE BEING BOWLED.
1 5 1
You can also find out an individual bowlers stats this way, to do this say the bowler has bowled 4 overs and gone for 16 runs, you would divide 16 by 4 and then you would know, that bowler is conceding 4 an over on average.