The mean of 10 observations was calculated as 60. It was detected on rechecking that the value of 55 was wrongly copied as 25. Find the correct mean.
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Answer:
The Mean is 63
Step-by-step explanation:
Solution :
The mean of 10 observations = 60
The sum of 10 observations = 60×10
= 600
If observation 55 was wrongly
copied as 25 then
correct observation = 55 - 25
= 30
Sum of correct observations = 600+30
= 630
Correct mean = 630/10
= 63
∵
Correct mean = 63
Hope it helps you
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