During the first year, the number of students in class X of a school increased by 12% and during the second year, it reduced by 9%. At the end of the second year, the number of students was 1274. What was the number of students in class X at the beginning of the first yea r?

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?