Question
Download Solution PDFAverage of 24 observations is 41. Average of first 9 observations is 42. Average of last 16 observations is 39. What is the value of 9th observation?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven:
The average of 24 observations is 41.
The average of first 9 observations is 42.
The average of last 16 observations is 39.
Calculation:
A total of 24 observations is,
⇒ 41 × 24 = 984
The total first of 9 observations is,
⇒ 9 × 42 = 378
The total of the last 16 observations is
⇒ 16 × 39 = 624
Sum of the total of 25 observation,
⇒ 624 + 378 = 1002
The value of 9th observation is
⇒ 1002 - 984 = 18
∴ The correct option is 3
Last updated on Jun 30, 2025
-> As per the notice published on 30th June 2025, the Staff Selection Commission has announced an extension for the application form correction window. Candidates can now make the required changes in their applications until 1st July 2025.
-> SSC MTS Notification 2025 has been released by the Staff Selection Commission (SSC) on the official website on 26th June, 2025.
-> For SSC MTS Vacancy 2025, a total of 1075 Vacancies have been announced for the post of Havaldar in CBIC and CBN.
-> As per the SSC MTS Notification 2025, the last date to apply online will be 24th July 2025 as per the SSC Exam Calendar 2025-26.
-> The selection of the candidates for the post of SSC MTS is based on Computer Based Examination.
-> Candidates with basic eligibility criteria of the 10th class were eligible to appear for the examination.
-> Candidates must attempt the SSC MTS Mock tests and SSC MTS Previous year papers for preparation.