A person spends X% of his monthly salary on rent. From the remaining amount, he allocates 30% towards EMI. The leftover sum is then divided between FDI and savings in the ratio 3 : 4. If the money spent on EMI is equal to the amount invested in FDI, determine the value of X.

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?