Jim Hosier has bowled 112 perfect games in his career.
As of 4-13-2015, the number of 300 games Bob Learn has bowled is 115.
It is not a known statistic, however for USBC, you can compare the list of names of who bowled a 300 and how many bowled an 800 and then how many of those who bowled an 800 had a 300.
no it is not to find out a average you need to add all the games you had together and divide it by the amount of games you bowled example: say i bowled a 168 156 and a 170 add them together that makes 494 since i bowled 3 games i dived it 3 so 494 dived 3 makes your average 164
If there are no extras, then only 30 balls will be bowled. If there are extras, more balls will be bowled depending on the number of extras.
there are 6 balls per over in cricket, unless a wide or no ball is bowled