The mean of 20 observations was 36.
The mean of 20 observations was 36. It was found later that an observation 25 was wrongly taken as 40. The corrected new mean is
Answer/Solution
35.25
Steps/Work
Explanation:
Correct Sum = (36 * 20 + 25 - 40) = 705
Correct mean = = 705/20 = 35.25
Answer: D
Correct Sum = (36 * 20 + 25 - 40) = 705
Correct mean = = 705/20 = 35.25
Answer: D