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 May 28, 2025
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