I want to know the answer to the following question:
Taken together, they account for what percentage of the total Russian Y chromosomal pool?
All the background I'm provided with is that "DNA samples from 1228 Russians show that the Y chromosomes analyzed, all except 20 (1.6%) fall into seven major haplogroups all characteristic to West Eurasian populations.". Is that enough to answer the question?
Answer: no