NDA 2025 Mathematics question
The arithmetic mean of 100 observations is 50. If 5 is subtracted from each observation and then divided by 20, then what is the new arithmetic mean?
Answer: (A)
Solution
If each observation is changed to , the mean changes in the
See the full step-by-step solution
Create a free account to read the complete working, and practise questions like this in a timed test.
Create a free account