The average salary, per head, of all the workers of an institution is 60. The average salary of 12 officers is 400; the average salary, per head, of the rest is 56. The total number of workers in the institution is -

32 is what percentage of 80?

0.001 is equivalent to: 

P is six times as large as Q. The percentage that Q is less than P, is:

The difference of two numbers is 15 % of their sum. the ratio of the larger number to the smaller number is: 

A man purchased 7 bags of rice at the rate of  ₹ 800 each, 8 bags of rice at ₹ 1000  each and 5 bags of rice at the rate of  ₹ 1200 each. What is the average cost of one bag of rice?

The average of 8 numbers is 27. If each of the numbers is multiplied by 8, find the average of new set of numbers.