Question
Download Solution PDFThe 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 (Detailed Solution Below)
Detailed Solution
Download Solution PDFCalculation:
Given,
Number of observations, n = 100
Original arithmetic mean,
Transformation applied to each observation:
New value,
The new arithmetic mean is,
∴ The new arithmetic mean is 2.25.
Hence, the correct answer is Option 1.
Last updated on Jul 8, 2025
->UPSC NDA Application Correction Window is open from 7th July to 9th July 2025.
->UPSC had extended the UPSC NDA 2 Registration Date till 20th June 2025.
-> A total of 406 vacancies have been announced for NDA 2 Exam 2025.
->The NDA exam date 2025 has been announced. The written examination will be held on 14th September 2025.
-> The selection process for the NDA exam includes a Written Exam and SSB Interview.
-> Candidates who get successful selection under UPSC NDA will get a salary range between Rs. 15,600 to Rs. 39,100.
-> Candidates must go through the NDA previous year question paper. Attempting the NDA mock test is also essential.