I cannot find any info of such, but according to the PMI outline it would be a percentage of the 175 questions dispersed across the processes with the remaining 25 spread somewhere in there.
What is the perceived benefit of finding the amount of questions per task?
Realise the test is weighted and that some answers are worth more than others, so I am not sure that focusing on quantitative things are more important than the qualitative aspects of the tests and the overall reason of the test