2009 · Q7
The mean of 25 observations is 36. The mean of first 13 observations is 32 and, that of last 13 observations is 39, what is the value of 13th observation?
Elementary MathematicsStatistics
- A20
- B23
- C32
- D40
Explanation
Solved; answer B.
The mean of 25 observations is 36. The mean of first 13 observations is 32 and, that of last 13 observations is 39, what is the value of 13th observation?
Explanation
Solved; answer B.