10% for the truly hot is too high i think. Way fewer then 1 out 10 girls in high school were "hot."
Probably more like 3-4 percent are "hot" or are considered the alpha females. Since, overall, it seems that man's looks are less important, a realistic number for an alpha male is ~10 percent.
BOth of these numbers go up significantly after not getting laid for a long period of time. I speak from experience.