Q42 2017, Percentage

In a city, 12% of households earn less than ₹ 30,000 per year, 6% households earn more than ₹ 2,00,000 per year, 22% households earn more than ₹ 1,00,000 per year and 990 households earn between ₹ 30,000 and ₹ 1,00,000 per year. How many households earn between ₹ 1,00,000 and ₹ 2,00,000 per year?

किसी शहर में 12% परिवार एक वर्ष में ₹ 30,000 से कम कमाते हैं, 6% परिवार एक वर्ष में ₹ 2,00,000 से अधिक कमाते हैं, 22% परिवार एक वर्ष में ₹ 1,00,000 से अधिक कमाते हैं तथा 990 परिवार एक वर्ष में ₹ 30,000 से ₹ 1,00,000 के बीच कमाते हैं। कितने परिवार एक वर्ष में ₹ 1,00,000 से ₹ 2,00,000 के बीच कमाते हैं?

According to the question:

Total households are 100%, then if 12% are below Rs.30000, X % are between 30,000 and 1,00,000, and 22% are above 1,00,000.

So, we get : 12 + X + 22 = 100 => X = 66%. This 66% is given to us as 990 households.

So households between Rs.1,00,000 and Rs.2,00,000 are 16% of 1500 ( = 22% - 6%), which is 240.