Question

In a factory 2/5 of all worker and more than rupees 12 per hour. the number of the workers earning rs 12 per hour or less is 120. how?manyworkers earn more than rs 12 per hour?

Answer 1

2/5 th workers earn  > 12 rupees per hour 

3/5 th workers earn !2 rupess or <  12 rupess per hour 

3/5 th of workers equal to 120 

Total number of workers = 200 ( 3/5 = 120 so 1(Total) = 120 * 5 / 3 = 200 )

So Number of workers earning more than 12 rupees per hour = 2/5 of 200 = 80 rupees

Answer 2

Let the total number of workers = N
number of workers earning more than  12/hour = 2/5 * N
number of workers earning less than or equal to 12/hour = N - 2/5 * N
Hence,   120 = 3/5 * N
               N = 200

Answer :   2/5 * N = 80