Question 1020647
Impossible to compute since it depends on many things, such as the bowlers' skills, lane conditions, bowling balls used, pin carry, ball/pin deflection, etc.


However I don't see that happen too often. But a fairly common exception is when you put two skilled bowlers together and they each happen to open up with 5 strikes in a row.


PS: You can feel free to use the more common notation, i.e.
1. 2. 3.
8- 7/ X