the mean of 40 observations was 200. it was detected on rechecking that the value of 65 was wrongly copied as 25 for computation o

1 thought on “the mean of 40 observations was 200. it was detected on rechecking that the value of 65 was wrongly copied as 25 for computation o”

1. Answer:

   8040 is the correct mean

   Step-by-step explanation:

   Given

   Number of observations= 40

   Mean= 200

   Mean= Sum of the observations/Number of the observations

   200=Sum of the observations/40

   200×40= Sum of the observations

   8000=Sum of the observations

   Wrong observation=25

   Therefore, 8000-25

   = 7975

   Correct observation=65

   Therefore, 7975+65

   = 8040

   Hence, 8040 is the correct mean

   Hope it helps!!

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