In a survey analysis, the percentage of the population affected by cold was found to be 3% in 1990 and 10% in 2020. What was the approximate percentage increase in the percentage of the population affected by cold in 2020 when compared to 1990?

In a town with 30,000 professionals, teachers make up 11% of the total professionals. If 46% of teachers are male, what is the number of female teachers in the town?

In a town's professional breakdown, doctors represent 18% and clerks represent 8% of the total professionals. If the number of doctors is 3000 greater than the number of clerks, what is the total number of professionals in the town?