Question

The total strength of a city is 10000. The number of boys and girls increased by 20% & 25% respectively and consequently the strength of the town becomes 12200. What was the number of boys in a city?

• A. 6000
• B. 4500
• C. 4000
• D. 4800

Answer 1

Answer:

A. 6000

Let the number of boys be x Then number of females = (10000 –x) 20% of x +25% of (10000 –x) = (12200-10000)= 2200 20x/100+25/100(10000-x) = 2200 30000 = 5x x = 6000