Question
The average working hours per month of the staff aged
over 50 years in a factory were 160 and that of the staff aged under 50 years were 210. The mean working hour per month of all the staff was 200. The ratio of the number of the staff aged over 50 to that of the staff aged under 50 is:Solution
The correct answer is D
Which of the following is NOT one of the methods of national income estimation?
Which of the following is the outer layer of the Earth that is made of plates which fit together like a jigsaw puzzle?

What is the minimum amount required for a case to fall under the jurisdiction of the Debt Recovery Tribunal (DRT)?
State bank buddy is a type of ______ wallet?
In 1960, Olympics Milkha Singh participated and represented India, where did the Olympics held in that year?
The White blood cells in human blood are also called:
Which state in India recently launched the ‘Shakti Scheme’ for women entrepreneurs?
In which musical note did Newland put the metals Co and Ni with halogens?
What is the mean annual average temperature zones? (in degrees Celsius) in Temperate vegetation zones?