Ranji ave FC ave Test ave
If one looks at the records of spinners of the past except Madan Lal
bowling averages at the Ranji level and at the Test level are almost
doubled in most cases. This benchmark appears to be quite accurate.
Back in the 70s, with very little 1-dayers being played, the bowlers
would mostly bowl in FC cricket. As a result, we get a clear idea
as to what will be the average if your FC average is above 30.